Informix is currently not one of our supported databases. The full list of supported databases is on the user wiki page. JBM 2.0 - when configured for JDBC persistence will use Hibernate so will support any database that Hibernate supports. For JBM 1.x, you need to write your own config file. If you do this, feel free to contribute it back to the project. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131033#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...