【EclipsePHP插件】php文件无法用php editor打开

applesun

成功安装了php插件以及完成了JAVA环境的配置，用php editor打开php文件的时候报错，只能用text editor打开
报错内容如下：
请指点如何解决，谢谢。。。

!ENTRY org.eclipse.ui 4 0 2010-05-22 21:13:42.432
!MESSAGE org/eclipse/ui/ide/FileStoreEditorInput
!STACK 0
java.lang.NoClassDefFoundError: org/eclipse/ui/ide/FileStoreEditorInput
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
        at java.lang.Class.getConstructor0(Class.java:2699)
        at java.lang.Class.newInstance0(Class.java:326)
        at java.lang.Class.newInstance(Class.java:30
        at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:157)
        at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:759)
        at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
        at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
        at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:234)
        at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:231)
        at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:911)
        at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:549)
        at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:372)
        at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:566)
        at org.eclipse.ui.internal.PartPane.requestActivation(PartPane.java:246)
        at org.eclipse.ui.internal.EditorPane.requestActivation(EditorPane.java:89)
        at org.eclipse.ui.internal.presentations.PresentablePart.setFocus(PresentablePart.java:152)
        at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:92)
        at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:267)
        at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:272)
        at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.handleMouseDown(AbstractTabFolder.java:342)
        at org.eclipse.ui.internal.presentations.util.AbstractTabFolder$3.mouseDown(AbstractTabFolder.java:79)
        at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:133)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:92
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:334
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:296
        at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1930)
        at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1894)
        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:422)
        at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
        at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
        at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:7
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:6
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
        at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
        at org.eclipse.core.launcher.Main.run(Main.java:977)
        at org.eclipse.core.launcher.Main.main(Main.java:952)
Caused by: java.lang.ClassNotFoundException: org.eclipse.ui.ide.FileStoreEditorInput
        at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:402)
        at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:347)
        at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:24
        ... 46 more