ok, i removed all commons-logging.jar from my ear file, war file and jar file. Also removed in MANIFEST file. But now, i have this message : 13:57:36,459 INFO [EjbModule] Deploying OrdreRencontre 13:57:37,056 ERROR [MainDeployer] Could not create deployment: file:/home/baudouin/site/binaires/jboss-4.0.4.GA/server/default/tmp/deploy/tmp12426orvault.ear-contents/siteweb.war java.lang.NoClassDefFoundError: org/apache/struts/action/ActionServlet at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:539) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4039789#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...