This topic should be moved to the EJB3 forum. I see that you are using SonicMQ and not JBoss Messaging. This forum is for JBoss Messaging. Have you defined a sonic mq provider. This should always be created. What this error means is that no provider could be found at jndi location java:/DefaultJMSProvider. Please see below on how to define a provider for sonic mq and then how to use the provideradapter in an annotation. If you define your sonicmq provider, you can tell the MDBs to use it by putting @ActivationConfigProperty(propertyName="providerAdapterJNDI", propertyValue="java:/RemoteJMSProvider") as an ActivationConfigProperty. [1]http://wiki.jboss.org/wiki/Wiki.jsp?page=IntegrationWithSonicMQ [2]http://wiki.jboss.org/wiki/Wiki.jsp?page=HowDoIConfigureAnEJB3MDBToTalk... If you need any more help, please move this to the EJB3 forum at http://www.jboss.com/index.html?module=bb&op=viewforum&f=221 and put a link from this topic to the new ejb3 topic. Jay:) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4094149#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...