我正在使用 Spring Roo 开发 SpringSource 工具套件。直到几天前我安装了 GWT 插件后，一切都运行良好（我认为这可能是一个问题，我不确定）。
每次我编写代码并按保存 (ctrl+s) 时，它都会显示一个对话框，显示
Errors occurred during the build.
Errors running builder 'AspectJ Builder' on project xyz123
org/eclipse/ajdt/core/builder/AJBuilder$SourceFilesChangedVisitor
eclipse.buildId=2.6.0.201103161000-RELEASE
java.version=1.6.0_24
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product com.springsource.sts.ide
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product com.springsource.sts.ide
Error
Wed Apr 27 14:33:03 EDT 2011
Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
java.lang.ClassFormatError: org/eclipse/ajdt/core/builder/AJBuilder$SourceFilesChangedVisitor
at org.eclipse.ajdt.core.builder.AJBuilder.sourceFilesChanged(AJBuilder.java:1707)
at org.eclipse.ajdt.core.builder.AJBuilder.hasChangesAndMark(AJBuilder.java:1639)
at org.eclipse.ajdt.core.builder.AJBuilder.build(AJBuilder.java:185)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:172)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:203)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:255)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:258)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:311)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:343)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:242)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
谁能帮我解决这个问题？
谢谢，