JBoss 4.0.5 and earlier do not support it. JBoss 4.2.0 supports it, but it defaults to /lib directory. You can override it by specifying the lib directory of your choice in /META-INF/jboss-app.xml. Here is an example: <?xml version='1.0' encoding='UTF-8'?<!DOCTYPE jboss-app PUBLIC "-//JBoss//DTD J2EE Application 4.2//EN" "http://www.jboss.org/j2ee/dtd/jboss-app_4_2.dtd" <jboss-app <library-directory>APP-INF/lib</library-directory</jboss-app View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4051136#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...