The server encountered an internal error () that prevented it

The server encountered an internal error () that prevented it from fulfilling this request.
 
  I can't resolved this and don't know how to do it .
 
  com.~controller.web.IllegalRequestPathException: リクエストパスが不正です。コマンド定义が正しいか、Commandが正しく生成されているか
  (eclipse3.0.0,Tomcat4.16,JDK1.5.03)
 
  Thanks

------解决方法--------------------------------------------------------
你是不是在common/lib下放置了一下自己的.jar文件？
  先把这些删除掉试试看。