I have already registered one of my Dayz Epoch server's with game tracker and claimed it and it was working fine. However now it shows that the server is offline even though It was up and running fine according to my host's control panel. Also I am trying to add my Dayz Overpoch server to the game tracker list but it won't register it.

Epoch Server Info: 192.31.185.201:3085
Overpoch Server Info: 198.154.118.45:6302

Your server is not responding under the gamespy4 query protocol. Please update your server so you get the changes which updated the query protocol.

Afterwards, the following will greatly help you:

http://www.gametracker.com/forums/forum.php?site=1&thread=94907