I mean using the standard start/stop methods on the MDB works, but the DeliveryActive attribute doesn't. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4221905#4221905 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4221905