I don't recall seeing anything indicating that it won't run on Tomcat 5.5--you just have to follow the instructions in the documentation for getting it to run on JBoss 4.0.5 (i.e. copying 4 specific jars to common/lib) in addition to following the instructions for adding JBoss Embedded to your Tomcat installation. When I do that, the booking example deploys properly. There is one thing in the change from including the microcontainer in the war file (like Seam 1.3.0.ALPHA did) to including JBoss Embedded in your Tomcat installation (like Seam 2.0.0.BETA expects) that does introduce a regression: JBoss Embedded doesn't seem to like spaces in the pathname to Tomcat, so if you try to use JBoss Embedded with Tomcat in its default windows location ("C:\Program Files\Apache Software Foundation\Tomcat 5.5") it will fail. Just install Tomcat to a path with no spaces, and you'll be fine. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058937#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...