Hi jaikiran, the -service.xml in META-INF instead of the JAR root results only in this error: | javax.naming.NameNotFoundException: MessageBeanQueue not bound | at org.jnp.server.NamingServer.getBinding(NamingServer.java:771) | at org.jnp.server.NamingServer.getBinding(NamingServer.java:779) | ... | 21:14:01,335 INFO [QueueService] Queue[queue/MessageBeanQueue] started, fullSize=200000, pageSize=2000, downCacheSize=2000 The first error (javax.management.InstanceAlreadyExistsException) is gone. So I assume that -service.xml files MUST be placed in META-INF? Is this correct? Or is there some problem that those files are deployed twice now? My MDB sample for JBoss 4.2 worked with this file in JAR root. For the "NameNotFoundException": is there some dependency of the MDB deployer to the service deployer, which is in the wrong order? Thanks Wolfgang View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4205381#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...