I'm trying to get JSF1.2 working with Jboss4.0.5GA and I followed the instuctions above to the letter but get the following error when I try and deploy the booking demo: java.lang.NoClassDefFoundError: javax/el/ELResolver I've put the el-api/ri.jar in the jsf-libs dir. One other thing I noticed was that in step (3) myfaces-api.jar was not referenced, rather myfaces-impl.jar was referenced. I've tried by jsf-impl.jar and jsf-api.jar in place of this with no effect. Thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4011294#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...