hello, looklike i m ok now..... i forgot few VERY important lines of code while starting ejb3 container deployer = EJB3StandaloneBootstrap.createDeployer(); deployer.getArchivesByResource().add("META-INF/persistence.xml"); deployer.create(); deployer.start(); in fact, it turned out that getArchivesByResources made the difference... thanks and regards marco View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973755#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...