The problem that you are saying is related to your portlet but the portal has issues what is the effective error. I have modified 2.4 and 2.6 such as it detects that it is a portlet error and does not make believe it's a portal error. So the error you have is actually | java.lang.NoClassDefFoundError: testcom/Communication | at org.jboss.portlet.hello.MyPortlet.doView(Unknown Source) | at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:167) | at javax.portlet.GenericPortlet.render(GenericPortlet.java:407) | at org.jboss.portal.portlet.container.PortletContainer.invokeRender(PortletContainer.java:525) | at org.jboss.portal.portlet.container.PortletContainer.dispatch(PortletContainer.java:441) | at org.jboss.portal.portlet.container.PortletContainerInvoker$1.dispatch(PortletContainerInvoker.java:143) | at org.jboss.portal.portlet.invocation.PortletInvocation.dispatch(PortletInvocation.java:242) | which means that your testcom/Communication class cannot be found. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3969517#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...