You as the server host can't add your server on the pinger list by just clicking it. Doing so will get you an (Unknown Ping), not unless you're renting a server &/or not running it at home. You need to manually add the internal server IP of your server by right clicking on it then clicking on
Add Internal Server. You then add your internal &/or localhost IP (typically it's
192.168.0.1 or depending upon your router configuration). You can also try a common localhost denominator (
127.0.0.1) & see it if works. After adding your localhost IP you then need to add the game server port you're using (default UDP port:
17479 or depending upon a particular server port you're using). If you're 100% sure that all ports are open then this should work.
Click the link below for a good tutorial on how to check your internal IP.
http://novalogic.com/linksys.asp
Gamers outside your network can add your server on their pingers the usual way.