thank you,PeterJ!!!! maybe because the message queue specified in the deployment doesn?t exit, right? then i build the queue. put the code to jbossmq-destinations-service.xml server display that 19:27:52,822 ERROR [MainDeployer] Could not create deployment: file:/D:/EE557Ser verSide/ejb3/jboss/server/default/deploy/jms/jbossmq-destinations-service.xml org.jboss.deployment.DeploymentException: Trying to install an already registere d mbean: jboss.mq.destination:service=Queue,name=MyQueue at org.jboss.system.ServiceCreator.install(ServiceCreator.java:103) do you know the problem? thank you !!!! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4096242#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...