Yes, your guess is correct. I am using 3.2 version, but not 3.1 version. Actually, I figuered out my last problem, and I successfully delopied my ear file into deploy folder. The total size is about 8k. However, when I turned on JBoss server and tried to run http:localhost:8080/fibo, it shows 404 error. My guess this time is something wrong with my xml file, but I didn't change anything from the tutorial. Does anyone have the same problem? Cheers Ming View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3979194#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...