This is identical to my approach. I am using INTEGER type also. What version of JBoss and Hibernate are you using? You can look into the Hibernate manifest.MF file under the META_INF folder in the jar if you are unsure I have versions: hibernate-entitymanager.jar 3.2.0.GA hibernate-annotations.jar 3.2.0.GA hibernate3.jar 3.2.3.ga View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4120989#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...