toddjtidwell wrote : However, I had JBoss messaging installed on this server This doesn't mean anything. The messaging server deploys within a scoped classloading domain, so other services won't be able to access classes from that domain (unless you specifically configure them to do so). toddjtidwell wrote : and also had the jboss-messaging-client.jar inside my SAR Deploy your service scoped as well. Then you're sure it will pick up the classes it needs from the jars you bundle with the SAR. Additional reading: http://wiki.jboss.org/wiki/PageInfo.jsp?page=JBossClassLoadingUseCases View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3966183#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...