This bug only occurs if I put the fuse package in my service/application. If I jar the fuse package seperately and put it in jboss/server/default/lib then the MBean works. The MBean continues to work after a redeploy too. I'm guessing this is related to the class loading problems that the hibernate service people suffered? Regards Doug View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3967070#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...