I'm sorry. I mispoke. JBM 2.0 is not going in jboss 5.x. JBM 1.4.1 is going in jboss5.x. JBM 2.0 is going to be something like jboss 5.1. So you should have a smooth transition from jbm 1.4.0 and 1.4.1. The difference for 1.4.1 is that there is no longer a dependency on the mbean structure inside the app server. Since jboss 5.x is pojo based, JBM had to change the implementation so that it is pojo-ified. This is a better change, because now JBM can work outside of the container. Makes it easier to test and makes it easier to embed somewhere else. I would recommend upgrading to 4.2.3(http://www.jboss.org/downloading/?projectId=jbossas&url=https:/... and installing JBM 1.4.0 sp3(http://www.jboss.org/jbossmessaging/downloads/). This is stable and has been out in the community for a while. It should do well for you. Jay:) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178835#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...