Hi ! I am able to get the datasource being properly deployed and able to see it at the server console also. There is no error so far with this part . But when I go for deployment of the entity bean then it shows an error that this jndi name is not a compound name and then the call to the entity also fails . I had already put the ds.xml file in the deploy directory but it when I go to access the entity it throws up this error : Internal Exception: javax.naming.InvalidNameException: Not a compound name: my-ejb-test 16:05:48,312 ERROR [STDERR] at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:220) 16:05:48,312 ERROR [STDERR] at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl. And the question about using Toplink , I mean since I am not using hibernate that's why I am making use of toplink jars for persisietnce . View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058521#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...