I would tell you to look in the server.log file because in that file you should see some DEBUG entries (with exception stack traces) that indicate that JMS discovered that the tables did not exist, after which it then creates them. But for some reason AS 5.1.0.GA was released with the logging level set to INFO. So try this - drop the tables from the database and then run the AS using: run -Djboss.server.log.threshold=DEBUG Then look at the JMS-related entries in the server.log. It might also help to turn query logging on in Sybase, that might give more hints as to what it going on. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4263747#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...