Hi Wolfgang, yes you are right, but here's my problem: if I take the Jboss5.0 version of jbosssx-client.jar, the program can't find the class and if I take the older version from 2007 I get [javac] F:\Entwicklung\JBoss_5.0\jw-0215-ejbsecurity\example\src\main\com\mkeym\customsec\ejb\TradingAccountSecurityProxy.java:22: com.m keym.customsec.ejb.TradingAccountSecurityProxy is not abstract and does not override abstract method So this doesn't fit some how. My question is, where can I find the jboss5.0 version of a jar that keeps the SecurityProxy class that fits. regards JRookie View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4227337#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...