Ok sorry, I jumped the last part of your answer... That could be it because that thing of lookup is not very clear to me. My interface : | package org.eu.nuadu.cuore.bd.query; | import datamodel.DAO.SystemUser; | | public interface QueryInt { | public abstract SystemUser AuthenticateUser(String uid, String pwd); | } | And code which uses the EJB: | package ws.process; | | import org.eu.nuadu.cuore.bd.query.Query; | import org.eu.nuadu.cuore.datamodel.DAO.SystemUser; | | public class Authentication { | | public void authenticate(){ | | SystemUser _SystemUser = new Query().AuthenticateUser("july","1234"); | if (_SystemUser != null) | System.out.println(_SystemUser.getIdSystemUser()); | } | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4153388#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...