Apache Geronimo problem while trying to upload a file using UploadBean

[shou2009]

Hi, I am using Eclipse Helios in Fedora 10 i386.

I am using WebSphere Application Server Community Edition plugin ( Apache Geronimo 2.1) in Eclipse.

My problem is that , I can not upload a file using UploadBean ( a very popular JavaBean ).

I am adding the jar files ( cos.jar , struts.jar , fileupload.jar , uploadbean.jar ) of UploadBean to the project as External JAR files . And then the Classpath is built.

But , when am trying to run the project on server ( Apache Geronimo 2.1) , I am getting this exception message.

The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /index.jsp(5,0) The value for the useBean class attribute javazoom.upload.UploadBean is invalid.
	org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
	org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
	org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)
	org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1220)
	org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1178)
	org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
	org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
	org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)
	org.apache.jasper.compiler.Node$Root.accept(Node.java:495)
	org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
	org.apache.jasper.compiler.Generator.generate(Generator.java:3417)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:231)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:347)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:312)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:806)

But, I can run the same bean files in Tomcat 5.5 without any exception.
Why is this happening ? Can you enlighten me ?