Already did that. When I do displayClassInfo on the home interface, I only see one "Instance1" and one "CodeSource". I did the same thing on the remote interface because the docs weren't clear which one I should be getting info on. Either way, the page says: "If you see multiple 'Instance1' and multiple CodeSources? then this could be the cause of the ClassCastExceptions that you are seeing." But I everything looks fine according to JMX, except that the app doesn't work. Other ideas? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3981764#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...