This is what i saw with eap 5 / org 5 and EJB3. I think this solution comes from the above issue: https://issues.jboss.org/browse/JBAS-7782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel
At any rate you can leave your EJB3 as is, but you need to add those annotations.