I'm trying to port my application from Jboss2.4.0-Tomcat3.2.3 to JBoss-2.4.3-Tomcat-4.0.
Everything went well except for this following error message.

[Default] java.lang.ClassCastException: $Proxy11
[Default] at $Proxy10.create(Unknown Source)
[Default] at org.apache.jsp.box_0005fctl$jsp._jspService(box_0005fctl$jsp.java:449)
[Default] at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source)
[Default] at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
[Default] at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(Unknown Source)
[Default] at org.apache.jasper.servlet.JspServlet.serviceJspFile(Unknown Source)
[Default] at org.apache.jasper.servlet.JspServlet.service(Unknown Source)
[Default] at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
[Default] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source)
[Default] at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source)
[Default] at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
[Default] at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
[Default] at org.apache.catalina.valves.CertificatesValve.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
[Default] at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardContext.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
[Default] at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
[Default] at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
[Default] at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
[Default] at org.apache.catalina.connector.http.HttpProcessor.process(Unknown Source)
[Default] at org.apache.catalina.connector.http.HttpProcessor.run(Unknown Source)
[Default] at java.lang.Thread.run(Thread.java:539)

Can anyone point to me, where could I be potentially making a mistake. Has anyone had this problem before. I'm not able to trace this exception into my code as it doesnt say anything is wrong in my application code(it was working with the earlier version of JBoss). Please, help me out.
Thanks,
Melwin