what causes this error ???

2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - IntelliJ IDEA 7.0.2 Build #7590
2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - JDK: 1.6.0_02
2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - VM: Java HotSpot(TM) Client VM
2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - Vendor: Sun Microsystems Inc.
2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - OS: Windows XP
2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - Last Action:
2008-01-17 10:45:46,100 ERROR - com.intellij.ide.IdeEventQueue - Original exception:
org.jdom.input.JDOMParseException: Error on line 1: Content is not allowed in prolog.

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:468)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:851)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:286)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:278)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.loadDocument(FileBasedStorage.java:15)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:8)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getStorageData(XmlElementStorage.java:66)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:28)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getState(XmlElementStorage.java:12)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.getState(FileBasedStorage.java:42)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.a(ComponentStoreImpl.java:54)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initJdomExternalizable(ComponentStoreImpl.java:80)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl$1.run(ComponentStoreImpl.java:3)

at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:286)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initComponent(ComponentStoreImpl.java:107)

at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:124)

at com.intellij.openapi.components.impl.ComponentManagerImpl.access$1100(ComponentManagerImpl.java:86)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:3)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:4)

at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:199)

at com.intellij.util.pico.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:186)

at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:168)

at org.picocontainer.alternatives.AbstractDelegatingMutablePicoContainer.getComponentInstance(AbstractDelegatingMutablePicoContainer.java:75)

at com.intellij.openapi.components.impl.ComponentManagerImpl.b(ComponentManagerImpl.java:54)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:90)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:77)

at com.intellij.openapi.wm.WindowManager.getInstance(WindowManager.java:26)

at com.intellij.openapi.vfs.newvfs.RefreshProgress$1.run(RefreshProgress.java:2)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)

at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:10)

at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:87)

at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:188)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.

at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)

at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)

at org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:453)

... 38 more

Caused by:

org.xml.sax.SAXParseException: Content is not allowed in prolog.

at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)

at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)

at org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:453)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:851)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:286)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:278)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.loadDocument(FileBasedStorage.java:15)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:8)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getStorageData(XmlElementStorage.java:66)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:28)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getState(XmlElementStorage.java:12)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.getState(FileBasedStorage.java:42)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.a(ComponentStoreImpl.java:54)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initJdomExternalizable(ComponentStoreImpl.java:80)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl$1.run(ComponentStoreImpl.java:3)

at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:286)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initComponent(ComponentStoreImpl.java:107)

at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:124)

at com.intellij.openapi.components.impl.ComponentManagerImpl.access$1100(ComponentManagerImpl.java:86)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:3)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:4)

at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:199)

at com.intellij.util.pico.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:186)

at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:168)

at org.picocontainer.alternatives.AbstractDelegatingMutablePicoContainer.getComponentInstance(AbstractDelegatingMutablePicoContainer.java:75)

at com.intellij.openapi.components.impl.ComponentManagerImpl.b(ComponentManagerImpl.java:54)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:90)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:77)

at com.intellij.openapi.wm.WindowManager.getInstance(WindowManager.java:26)

at com.intellij.openapi.vfs.newvfs.RefreshProgress$1.run(RefreshProgress.java:2)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)

at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:10)

at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:87)

at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:188)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - Error during dispatching of java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=com.intellij.openapi.vfs.newvfs.RefreshProgress$2@46530,notifier=null,catchExceptions=false,when=1200584836865] on sun.awt.windows.WToolkit@1a4a1c9
com.intellij.openapi.components.StateStorage$StateStorageException: Error while parsing C:\Documents and Settings\xxxxxx\.IntelliJIdea70\config\options\window.manager.xml.
File is probably corrupted:
Error on line 1: Content is not allowed in prolog.

at com.intellij.openapi.components.impl.stores.FileBasedStorage.loadDocument(FileBasedStorage.java:8)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:8)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getStorageData(XmlElementStorage.java:66)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:28)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getState(XmlElementStorage.java:12)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.getState(FileBasedStorage.java:42)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.a(ComponentStoreImpl.java:54)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initJdomExternalizable(ComponentStoreImpl.java:80)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl$1.run(ComponentStoreImpl.java:3)

at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:286)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initComponent(ComponentStoreImpl.java:107)

at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:124)

at com.intellij.openapi.components.impl.ComponentManagerImpl.access$1100(ComponentManagerImpl.java:86)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:3)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:4)

at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:199)

at com.intellij.util.pico.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:186)

at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:168)

at org.picocontainer.alternatives.AbstractDelegatingMutablePicoContainer.getComponentInstance(AbstractDelegatingMutablePicoContainer.java:75)

at com.intellij.openapi.components.impl.ComponentManagerImpl.b(ComponentManagerImpl.java:54)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:90)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:77)

at com.intellij.openapi.wm.WindowManager.getInstance(WindowManager.java:26)

at com.intellij.openapi.vfs.newvfs.RefreshProgress$2.run(RefreshProgress.java:4)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)

at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:10)

at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:87)

at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:188)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

Caused by: org.jdom.input.JDOMParseException: Error on line 1: Content is not allowed in prolog.

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:468)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:851)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:286)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:278)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.loadDocument(FileBasedStorage.java:15)

... 34 more

Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.

at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)

at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)

at org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:453)

... 38 more

2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - IntelliJ IDEA 7.0.2 Build #7590
2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - JDK: 1.6.0_02
2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - VM: Java HotSpot(TM) Client VM
2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - Vendor: Sun Microsystems Inc.
2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - OS: Windows XP
2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - Last Action:
2008-01-17 10:47:16,881 ERROR - com.intellij.ide.IdeEventQueue - Original exception:
org.jdom.input.JDOMParseException: Error on line 1: Content is not allowed in prolog.

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:468)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:851)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:286)

at com.intellij.openapi.util.JDOMUtil.loadDocument(JDOMUtil.java:278)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.loadDocument(FileBasedStorage.java:15)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:8)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getStorageData(XmlElementStorage.java:66)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.a(XmlElementStorage.java:28)

at com.intellij.openapi.components.impl.stores.XmlElementStorage.getState(XmlElementStorage.java:12)

at com.intellij.openapi.components.impl.stores.FileBasedStorage.getState(FileBasedStorage.java:42)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.a(ComponentStoreImpl.java:54)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initJdomExternalizable(ComponentStoreImpl.java:80)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl$1.run(ComponentStoreImpl.java:3)

at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:286)

at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initComponent(ComponentStoreImpl.java:107)

at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:124)

at com.intellij.openapi.components.impl.ComponentManagerImpl.access$1100(ComponentManagerImpl.java:86)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:3)

at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:4)

at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:199)

at com.intellij.util.pico.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:186)

at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:168)

at org.picocontainer.alternatives.AbstractDelegatingMutablePicoContainer.getComponentInstance(AbstractDelegatingMutablePicoContainer.java:75)

at com.intellij.openapi.components.impl.ComponentManagerImpl.b(ComponentManagerImpl.java:54)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:90)

at com.intellij.openapi.components.impl.ComponentManagerImpl.getComponent(ComponentManagerImpl.java:77)

at com.intellij.openapi.wm.WindowManager.getInstance(WindowManager.java:26)

at com.intellij.openapi.vfs.newvfs.RefreshProgress$2.run(RefreshProgress.java:4)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)

at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:10)

at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:87)

at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:188)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.

at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)

at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)

at org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)

at org.jdom.input.SAXBuilder.build(SAXBuilder.java:453)

... 38 more