anonymous wrote : file:/C:/jboss-4.2.2.GA/server/default/deploy/jms/RosterApp.ear; - nested throwable: (javax.management.InstanceAlreadyExistsException: jboss.j2ee:service=EARDeployment,url='RosterApp.ear' already registered. Any specific reason for placing the RosterApp.ear inside the jms folder? The applications are usually placed directly under the deploy folder. As for the exception you are seeing, looks like the RosterApp.ear is already deployed. I guess, you have this same application in some other folder and JBoss has already deployed it. Can you post the entire console logs? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4176366#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...