Spring plugin exception under JDK 1.4

Keep getting this exception:

(DocumentBuilderLocator.java:145) at org.apache.xerces.jaxp.DocumentBuilderFactoryLocator.newDocumentBuilder(DocumentBuilderFactoryLocator.java:162) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.createDocumentBuilder(XmlBeanDefinitionReader.java:210) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:147) at com.yanaware.intellij.ideaspring.parser.SpringParserImpl.analyzeFiles(SpringParserImpl.java:567) at com.yanaware.intellij.ideaspring.parser.SpringParserImpl.browseSets(SpringParserImpl.java:596) at com.yanaware.intellij.ideaspring.parser.SpringParserImpl.access$200(SpringParserImpl.java:63) at com.yanaware.intellij.ideaspring.parser.SpringParserImpl$2$1.run(SpringParserImpl.java:268) at com.intellij.openapi.application.impl.LaterInvocatorEx$FlushQueue.run(LaterInvocatorEx.java:3) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent(EventQueue.java:454) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:25) at com.intellij.ide.IdeEventQueue.a(IdeEventQueue.java:128) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:62) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137) at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)]]>