Hi ,
Thanks for your reply , yes this happeneds randomly , and it hangs when it reaches "emf.createEntityManager" and nothing happeneds but sometimes it takes more than 2 min. to work but sometimes it fails , i can issue this problem run it from simple java application but iam useing IBM Websphere AS 6.1 , i checked the meta data and it looks fine to me , the worst thing it works sometime smoothly and from the first time , and another thing to add , the very same configuration and DB is working fine with Hibernate EntityManager , and about the lastest Toplink-essentials i tried multi versions ( on of them is the new 11g jar ) , but useless , any hints or ideas , Thanks