Daniel Cullender [http://community.jboss.org/people/cullendw] replied to the discussion "Please help me to solve the problem" To view the discussion, visit: http://community.jboss.org/message/543678#543678 -------------------------------------------------------------- make sure that your client libraries are compatible with the server libraries you are connecting to. Different versions of the same class would result in the id mismatch (if the id was updated which seems to be the case here). -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/543678#543678] Start a new discussion in EJB 3.0 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]