ge0ffrey, Do not forget to remove the el-*.jar files from the app and from application.xml as well (on page 315 ;)). Go to the book web site to download all sample projects for 4.2.0 (as well as for 4.0.5). Yes, migrating from 4.0.5 to 4.2.0 is a pain because we switched from MyFaces to JSF RI. But that should stay stable for the foreseeable future -- meaning that migrating to JBoss AS 5.0 should be very easy. cheers Michael View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048828#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...