anonymous wrote : Stacktrace: | javax.naming.CommunicationException [Root exception is java.io.InvalidClassException: org.jboss.invocation.InvokerInterceptor; unable to create instance] You havent posted the entire exception stacktrace that you see in the logs yet. Going by this one line its difficult to tell why you are seeing this exception. When does this exception occur? When you are deploying your application or when you are accessing the application? Does it occur on the server or on the client from where you invoke the application? This exception usually occurs when you are using an incorrect version of a jar file. Post the entire exception stacktrace. That might help in identifying the problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131812#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...