If you are just trying to get started with Seam, don't bother with JBoss 5. Instead, follow the instructions right at the top of this thread to run Seam and JSF 1.2 on JBoss 4.0.5. (It *is* possible!) BUT: Step 5 has changed - in the above it reads: (5) remove el-*.jar from examples/booking/resources/WEB-INF/lib In more recent releases of Seam, you will notice that this directory does not exist. So what you need to do instead is remove the EL jar declarations from examples/booking/application.xml. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4021689#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...