Sorry for delay with answer. I have solved my problems with new jems GA installer. Current functions are working fine now. But I still have a lot of questions (maybe someone has answers for my stupid questions :)) 1. I deploy my app separately in 2 arch - jar with ejb3 components and war with servlets components. There are not any classes of EJB3 jar in war archive (in lib dir or WEB-INF/classes). But when I execute servlet method which invoke or operate with EJB3 POJO or EJB3 Session beans - all is fine!!! I looked in runtime in POJONAME.class.getProtectionDomain().getCodeSource().getLocation(); - and saw that it is loaded for JAR file! How it can be? I always thought that each module has it's own classloader. to dmitryak - thank you for help - now I use provided snippet in my code. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008531#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...