Sorry me, this is the correct one <?xml version="1.0" encoding="UTF-8"?> | <application xmlns="http://java.sun.com/xml/ns/j2ee" version="1.4" | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | xsi:schemaLocation="http://java.sun.com /xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd"> | | <display-name>appname</display-name> | <module> | <java>util.jar</java> | </module> | <module> | <ejb>ejb.jar</ejb> | </module> | <module> | <web> | <web-uri>web.war</web-uri> | <context-root>appname</context-root> | </web> | </module> | | </application> This is my application.xml, only difference i see is order of modules (i suppose this is not the reason), and the doctype declaration which uses diferent dtd. Could be this? the error i see is java.lang.LinkageError: Class javax/ejb/EJBHome violates loader constraints: definition mismatch between parent and child loaders View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973268#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...