First, you do realize that JBoss AS 5.0.0.GA comes with JBoss Messaging 4.2.1.GA? If you stil want to upgrade to 4.2.2.GA, then go to jbosss-messaging-1.4.2.GA/util and run: ant -f release-admin.xml -Djboss.home=<location-of-jbossas> You will get a new configuration named 'messaging' which is a copy of 'default' with Messaging 4.2.2 installed. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4207402#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...