Hi I am using Jboss 4.2.3, I replaces the hsqldb-jdbc-state-service.xml with mysql-jdbc-state-service.xml and hsqldb-jdbc2-service.xml with mysql-jdbc2-service.xml. I changed the data source to point to the datasource created for my jms messages. <depends optional-attribute-name="ConnectionManager">jboss.jca:service=DataSourceBinding,name=jmsDataSource</depends> However when I try to start my server, it fails to deploy the MDBs and fails with error 'Could not find the queue destination-jndi-name' and then 'javax.management.InstanceAlreadyExistsException'. Am I doing it write or is there more to it than meets the eye? Thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4230639#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...