savana, you should be using persistence.xml to reference your jta data source and tell what sql dialect to use, then have a myssql-ds.xml file for the datasource, into your deploy folder. hibernate.cfg.xml is only used to generate de CRUD app, not to run it. Im not sure but I think you're confused on how hibernate gets connected to the database when running the app. Cheers. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3958940#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...