I've written a simple valve but have a problem I've deployed the jar file containing the class to JBOSS\server\default\deploy\jbossweb-tomcat55.sar and I've added a valve entry in the server.xml However I'm getting the following error 19:01:12,750 ERROR [Digester] Begin event threw exception java.lang.ClassNotFoundException: No ClassLoaders found for: com.fooco.util.security.valves.UserLoggerValve at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:306) It seems logical to deploy the jar file in the tomcat sar directory... can't think of where else it might need to be. Could it be a question of compiler compatability? I am compiling under JDK 5.0. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982751#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...