What are you passing to the PortableRemoteObject.narrow method? It should be the the remote home interface. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3975619#3975619 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3975619