Hello everyone. I have a problem that I really need to resolve as fast as possible. I have an EJB3 application deployed on JBoss 5.1.0.GA. Consuming those EJB3 with remote clients in other applications also deployed in JBoss 5 works fine. But the problem is that I need to consume one EJB3 in a client that has to be deployed in a JBoss 4.2.3.GA. I always get ClassCastException, I imagine because of diferent ClassLoaders. I can't find anywhere what I have to do. I tryed to put several JBoss5 jars in the classpath of the application running in JBoss 4, but still can't manage to make it work. The articles I found about ClassLoaders are usualy about isolating applications running in the same JBoss, but I want to consume in a remote client in a diferent JBoss. Please, can somebody tell me or lead me to some article or document to help me? Thanks, Rodrigo View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4258214#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...