One of the following suggestions may help you:

Your server is currently offline.
GameTracker needs your server to be online before you can add it to our database. Please restart your server and make sure it's up before hitting ADD SERVER again.
You entered the wrong query port.
Please update your query port and hit scan again
Your server is firewalled.
Please turn off any firewall you have that may block scanning or whitelist the gametracker scanning IP addresses:
208.167.241.190
208.167.241.185
208.167.241.186
208.167.241.183
208.167.241.189
108.61.78.147
108.61.78.148
108.61.78.149
108.61.78.150

This is my problem.
Server is running only gametracker not scan.
I have VPS wite Debian.
All ip added the iptables.
(imput,output all accept)
Sorry bad english.Thanks for help.

Have you opened the ports and firewall ?

b0untyhunter wrote:
Have you opened the ports and firewall ?
Yes im play the server only gametracker not scan...

Please consider posting the game, IP, port, and query port if you are looking for some sort of assistance.

The hlsw scanning. And query port is 27021 and port 27021
Counter-Strike 1.6

Your server is not scanning on HLSW or providing a response to the GT scanner. You seem to be blocking traffic from the United States. Since the GT scanner is in the US, you will need to undo that firewall policy if you want it to scan here.