Hi, this is my problem: I have an application (WAR) running on Jboss 4.0.2 that call EJBs (2.x) deployed in an EAR on the same Jboss (it still works if EJB are on remote Joss). Now I want to migrate this application and the EAR containing the EJB on Jboss 4.2.1GA. I thought that all I have to do was to replace the jbossall-clint.jar inside my war application, but if I replace the jar, the application is not deployed on Jboss 4.2.1. Any ideas? Which are the jars that I have to put on the clint's classpath??