Deploy your application : in the servers pane, right clic on your server, then deploy.
Now start the server. On the servers pane, right click on your server, then choose Deploy, and Start
Check the log file ("console" view). Check that you do not have any error (no excpetion).
You should see the log ****** the simple sip servlet has been started *********
Now, the server should be listening on the UDP port 5080 (can be checked by the netstat -an command). It should contain the following line. (if you want grep, I recommand you install MINGW to get grep and tail).