The missing class, org/apache/log4j/Layout, is found in the server/xxx/lib/log4j.jar file. Jboss should pick up that file automatically. Based on the fact that you have JBoss in Program Files, I am going to guess that you installed JBoss using the installer. I suggest re-installing JBoss to somewhere other than Program Files (mine is at c:/apps/jboss-4.0.5.ga) . Also, if you installed the JDK in Program Files, also reinstall it elsewhere (mine is at c:/apps/jdk1.5.0_11). Yes, those installers default to Program Files, but spaces in directory names causes some Java libraries fits, so it is usually prudent to avoid Program Files. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4022119#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...