I just downloaded latest version of Eclipse (3.1.1) and JBoss IDE 1.5.0M3 after reading that stable version cannot be run in newest version of Eclipse.

When I upgraded, I see this error at the editing window.

Unable to create this part due to an internal error. Reason for the failure: The editor class could not be instantiated. This usually indicates that the editor's class name was mistyped in plugin.xml.

java.lang.ClassNotFoundException: org.jboss.ide.eclipse.jdt.aop.ui.editors.AopJavaEditor
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:405)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1248)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:48)
at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:240)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:236)
at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:252)
at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:842)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:562)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:384)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:552)
at org.eclipse.ui.internal.EditorAreaHelper.setVisibleEditor(EditorAreaHelper.java:258)
at org.eclipse.ui.internal.EditorManager.setVisibleEditor(EditorManager.java:1221)
at org.eclipse.ui.internal.EditorManager$5.run(EditorManager.java:949)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.runtime.Platform.run(Platform.java:783)
at org.eclipse.ui.internal.EditorManager.restoreState(EditorManager.java:944)
at org.eclipse.ui.internal.WorkbenchPage.restoreState(WorkbenchPage.java:2576)
at org.eclipse.ui.internal.WorkbenchWindow.restoreState(WorkbenchWindow.java:1819)
at org.eclipse.ui.internal.Workbench.doRestoreState(Workbench.java:2566)
at org.eclipse.ui.internal.Workbench.access$14(Workbench.java:2515)
at org.eclipse.ui.internal.Workbench$19.run(Workbench.java:1514)
at org.eclipse.ui.internal.Workbench$16.run(Workbench.java:1263)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:346)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:291)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:447)
at org.eclipse.ui.internal.Workbench.runStartupWithProgress(Workbench.java:1258)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1512)
at org.eclipse.ui.internal.Workbench.access$12(Workbench.java:1491)
at org.eclipse.ui.internal.Workbench$17.run(Workbench.java:1374)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.runtime.Platform.run(Platform.java:783)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1318)
at org.eclipse.ui.internal.WorkbenchConfigurer.restoreState(WorkbenchConfigurer.java:183)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:700)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1034)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1636)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
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:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

Any solution?