HELP!IDEA 9.0.1 cannot startup Follow

plz help, the logs is as following

2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - IntelliJ IDEA 9.0.1  Build #IU-93.94
2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - JDK: 1.6.0_17
2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - VM: Java HotSpot(TM) Client VM
2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - Vendor: Sun Microsystems Inc.
2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - OS: Windows XP
2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - Last Action: EditorBackSpace
2011-07-20 14:06:34,806 [451228603]  ERROR - currency.PrioritizedFutureTask - Original exception:  
java.lang.RuntimeException: java.lang.RuntimeException: Mapping failed: C:\Documents and Settings\admin\.IntelliJIdea90\system\index\stubs\java.class.extlist\java.class.extlist, position=0, length=526132
    at com.intellij.util.io.PersistentEnumerator.enumerateImpl(PersistentEnumerator.java:351)
    at com.intellij.util.io.PersistentEnumerator.tryEnumerate(PersistentEnumerator.java:172)
    at com.intellij.util.io.PersistentHashMap.get(PersistentHashMap.java:217)
    at com.intellij.util.indexing.MapIndexStorage$1$1.compute(MapIndexStorage.java:78)
    at com.intellij.util.indexing.MapIndexStorage$1$1.compute(MapIndexStorage.java:70)
    at com.intellij.util.indexing.ChangeTrackingValueContainer.a(ChangeTrackingValueContainer.java:125)
    at com.intellij.util.indexing.ChangeTrackingValueContainer.getValueIterator(ChangeTrackingValueContainer.java:93)
    at com.intellij.util.indexing.ValueContainer.forEach(ValueContainer.java:53)
    at com.intellij.psi.stubs.StubIndexImpl.get(StubIndexImpl.java:176)
    at com.intellij.psi.stubs.AbstractStubIndex.get(AbstractStubIndex.java:34)
    at com.intellij.psi.impl.java.stubs.index.JavaSuperClassNameOccurenceIndex.get(JavaSuperClassNameOccurenceIndex.java:45)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher$4.compute(JavaDirectInheritorsSearcher.java:71)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher$4.compute(JavaDirectInheritorsSearcher.java:69)
    at com.intellij.openapi.application.impl.ApplicationImpl$10.run(ApplicationImpl.java:721)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:691)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:719)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher.execute(JavaDirectInheritorsSearcher.java:69)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher.execute(JavaDirectInheritorsSearcher.java:27)
    at com.intellij.util.ExecutorsQuery.processResults(ExecutorsQuery.java:35)
    at com.intellij.util.AbstractExecutorsQuery.forEach(AbstractExecutorsQuery.java:77)
    at com.intellij.util.UniqueResultsQuery.doForEach(UniqueResultsQuery.java:54)
    at com.intellij.util.UniqueResultsQuery.forEach(UniqueResultsQuery.java:62)
    at com.intellij.psi.search.searches.ClassInheritorsSearch.processInheritors(ClassInheritorsSearch.java:217)
    at com.intellij.psi.search.searches.ClassInheritorsSearch.access$100(ClassInheritorsSearch.java:41)
    at com.intellij.psi.search.searches.ClassInheritorsSearch$1.execute(ClassInheritorsSearch.java:64)
    at com.intellij.psi.search.searches.ClassInheritorsSearch$1.execute(ClassInheritorsSearch.java:48)
    at com.intellij.util.ExecutorsQuery.processResults(ExecutorsQuery.java:35)
    at com.intellij.util.AbstractExecutorsQuery.forEach(AbstractExecutorsQuery.java:77)
    at com.intellij.util.AbstractExecutorsQuery.findFirst(AbstractExecutorsQuery.java:57)
    at com.intellij.util.UniqueResultsQuery.findFirst(UniqueResultsQuery.java:46)
    at com.intellij.codeInsight.daemon.impl.JavaLineMarkerProvider.a(JavaLineMarkerProvider.java:169)
    at com.intellij.codeInsight.daemon.impl.JavaLineMarkerProvider.collectSlowLineMarkers(JavaLineMarkerProvider.java:157)
    at com.intellij.codeInsight.daemon.impl.SlowLineMarkersPass.addLineMarkers(SlowLineMarkersPass.java:73)
    at com.intellij.codeInsight.daemon.impl.SlowLineMarkersPass.doCollectInformation(SlowLineMarkersPass.java:64)
    at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:54)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1$1.run(PassExecutorService.java:328)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:691)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1.run(PassExecutorService.java:320)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:222)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:317)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.RuntimeException: Mapping failed: C:\Documents and Settings\admin\.IntelliJIdea90\system\index\stubs\java.class.extlist\java.class.extlist, position=0, length=526132
    at com.intellij.util.io.ReadWriteMappedBufferWrapper.map(ReadWriteMappedBufferWrapper.java:63)
    at com.intellij.util.io.MappedBufferWrapper.buf(MappedBufferWrapper.java:68)
    at com.intellij.util.io.PagedFileStorage.getBuffer(PagedFileStorage.java:260)
    at com.intellij.util.io.PagedFileStorage.get(PagedFileStorage.java:170)
    at com.intellij.util.io.PagedFileStorage.getInt(PagedFileStorage.java:121)
    at com.intellij.util.io.ResizeableMappedFile.getInt(ResizeableMappedFile.java:139)
    at com.intellij.util.io.PersistentEnumerator.enumerateImpl(PersistentEnumerator.java:276)
    ... 45 more
2011-07-20 14:08:10,790 [451324587]  ERROR - aemon.impl.PassExecutorService - java.lang.RuntimeException: Mapping failed: C:\Documents and Settings\admin\.IntelliJIdea90\system\index\stubs\java.class.extlist\java.class.extlist, position=0, length=526132
java.lang.RuntimeException: java.lang.RuntimeException: Mapping failed: C:\Documents and Settings\admin\.IntelliJIdea90\system\index\stubs\java.class.extlist\java.class.extlist, position=0, length=526132
    at com.intellij.util.io.PersistentEnumerator.enumerateImpl(PersistentEnumerator.java:351)
    at com.intellij.util.io.PersistentEnumerator.tryEnumerate(PersistentEnumerator.java:172)
    at com.intellij.util.io.PersistentHashMap.get(PersistentHashMap.java:217)
    at com.intellij.util.indexing.MapIndexStorage$1$1.compute(MapIndexStorage.java:78)
    at com.intellij.util.indexing.MapIndexStorage$1$1.compute(MapIndexStorage.java:70)
    at com.intellij.util.indexing.ChangeTrackingValueContainer.a(ChangeTrackingValueContainer.java:125)
    at com.intellij.util.indexing.ChangeTrackingValueContainer.getValueIterator(ChangeTrackingValueContainer.java:93)
    at com.intellij.util.indexing.ValueContainer.forEach(ValueContainer.java:53)
    at com.intellij.psi.stubs.StubIndexImpl.get(StubIndexImpl.java:176)
    at com.intellij.psi.stubs.AbstractStubIndex.get(AbstractStubIndex.java:34)
    at com.intellij.psi.impl.java.stubs.index.JavaSuperClassNameOccurenceIndex.get(JavaSuperClassNameOccurenceIndex.java:45)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher$4.compute(JavaDirectInheritorsSearcher.java:71)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher$4.compute(JavaDirectInheritorsSearcher.java:69)
    at com.intellij.openapi.application.impl.ApplicationImpl$10.run(ApplicationImpl.java:721)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:691)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:719)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher.execute(JavaDirectInheritorsSearcher.java:69)
    at com.intellij.psi.impl.search.JavaDirectInheritorsSearcher.execute(JavaDirectInheritorsSearcher.java:27)
    at com.intellij.util.ExecutorsQuery.processResults(ExecutorsQuery.java:35)
    at com.intellij.util.AbstractExecutorsQuery.forEach(AbstractExecutorsQuery.java:77)
    at com.intellij.util.UniqueResultsQuery.doForEach(UniqueResultsQuery.java:54)
    at com.intellij.util.UniqueResultsQuery.forEach(UniqueResultsQuery.java:62)
    at com.intellij.psi.search.searches.ClassInheritorsSearch.processInheritors(ClassInheritorsSearch.java:217)
    at com.intellij.psi.search.searches.ClassInheritorsSearch.access$100(ClassInheritorsSearch.java:41)
    at com.intellij.psi.search.searches.ClassInheritorsSearch$1.execute(ClassInheritorsSearch.java:64)
    at com.intellij.psi.search.searches.ClassInheritorsSearch$1.execute(ClassInheritorsSearch.java:48)
    at com.intellij.util.ExecutorsQuery.processResults(ExecutorsQuery.java:35)
    at com.intellij.util.AbstractExecutorsQuery.forEach(AbstractExecutorsQuery.java:77)
    at com.intellij.util.AbstractExecutorsQuery.findFirst(AbstractExecutorsQuery.java:57)
    at com.intellij.util.UniqueResultsQuery.findFirst(UniqueResultsQuery.java:46)
    at com.intellij.codeInsight.daemon.impl.JavaLineMarkerProvider.a(JavaLineMarkerProvider.java:169)
    at com.intellij.codeInsight.daemon.impl.JavaLineMarkerProvider.collectSlowLineMarkers(JavaLineMarkerProvider.java:157)
    at com.intellij.codeInsight.daemon.impl.SlowLineMarkersPass.addLineMarkers(SlowLineMarkersPass.java:73)
    at com.intellij.codeInsight.daemon.impl.SlowLineMarkersPass.doCollectInformation(SlowLineMarkersPass.java:64)
    at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:54)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1$1.run(PassExecutorService.java:328)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:691)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1.run(PassExecutorService.java:320)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:222)
    at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:317)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.RuntimeException: Mapping failed: C:\Documents and Settings\admin\.IntelliJIdea90\system\index\stubs\java.class.extlist\java.class.extlist, position=0, length=526132
    at com.intellij.util.io.ReadWriteMappedBufferWrapper.map(ReadWriteMappedBufferWrapper.java:63)
    at com.intellij.util.io.MappedBufferWrapper.buf(MappedBufferWrapper.java:68)
    at com.intellij.util.io.PagedFileStorage.getBuffer(PagedFileStorage.java:260)
    at com.intellij.util.io.PagedFileStorage.get(PagedFileStorage.java:170)
    at com.intellij.util.io.PagedFileStorage.getInt(PagedFileStorage.java:121)
    at com.intellij.util.io.ResizeableMappedFile.getInt(ResizeableMappedFile.java:139)
    at com.intellij.util.io.PersistentEnumerator.enumerateImpl(PersistentEnumerator.java:276)
    ... 45 more