hello, i have new server and its not claim gametracker, the matter i wants to claim this server but i cant i do everything sites telling me , when i do change hostname and everything done, gametracker says server country offline but the server is ONLINE

If the server is listed as offline but it is actually running, it's safe to say there is a firewall issue on your end. Please check your network to ensure the query port of your server is open your firewall.