<mbean code="org.jboss.resource.connectionmanager.XATxConnectionManager" | java.lang.ClassNotFoundException: org.jboss.resource.connectionmanager.XATxConnectionManager That looks like a genuine CNFE and not related to any classloading configurations. I don't see that class being shipped in the AS. Infact, i see a thread where a user has mentioned that it's not even shipped in AS-4.2.x (actually the LocalTxConnectionManager) http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4063708 View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269837#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...