求助，spring2.5的控制器使用问题？

我现在项目启动，新增菜单和设置权限，当我选择菜单的时候，提示如下：

警告: 发生系统异常，返回上页或与管理员联系.

Cannot create command without commandClass being set - either set commandClass or (in a form controller) override formBackingObject

点击查看详细信息 java.lang.IllegalStateException: Cannot create command without commandClass being set - either set commandClass or (in a form controller) override formBackingObject
    at org.springframework.web.servlet.mvc.BaseCommandController.createCommand(BaseCommandController.java:358)
    at org.springframework.web.servlet.mvc.AbstractFormController.formBackingObject(AbstractFormController.java:477)
    at org.springframework.web.servlet.mvc.AbstractFormController.getErrorsForNewForm(AbstractFormController.java:358)
    at org.springframework.web.servlet.mvc.AbstractFormController.showNewForm(AbstractFormController.java:338)
    at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:278)
    at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at webapp.action.dms.filter.AuthFilter.doFilter(AuthFilter.java:103)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.ecside.filter.ECSideFilter.doFilter(ECSideFilter.java:188)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:383)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908


有木有高手知道问题出在哪，如果解决这个问题？请详细说明下，谢谢
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你没有源码，不知道怎么找错。。。
java.lang.IllegalStateException该异常是指 在错误的时间或环境下 调用了错误的方法，比如Servlet没有初始化就去调用了do*方法，
http://forum.springsource.org/showthread.php?42482-quot-Cannot-create-command-without-commandClass-quot-error-message你英语好的话，你可以去看看，能找到答案
----------------解决方案--------------------------------------------------------