Well, I'm not providing the 8080 port cause I use Swing as my client-end. So there's no official way to access jmx-console. I found it takes 3 seconds for the first-time-call, the second, third... call need only miliseconds. So I suppose it's the time needed to establish a kind of connection with the server. Guess it's normal. Just now I tried to restart my firewall with the exception of 1099 (TCP) port. After restarting the firewall on the server, the Swing on client computer could no longer call the remote method (I didn't see any results). But no java exception reported. Do I need to set other ports free? Sorry for bothering you with so many questions, I'm new to EJB. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4179376#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...