I can not bother the server saying he's offline and he's online .. possible to be in blacklist .. but i do not know why
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
208.167.241.184
208.167.241.188
108.61.78.150
108.61.78.149
Your server isn't configured to respond to scan requests. To configure your server to respond properly to GameTracker.com scan requests, please visit this forum thread.

Moved: Not a Gametracker bug.


This is why we have a Guides & FAQs section.

General connection advice:
My server will not add or shows as down, what should I do?

TS3 specific advice:
Common TeamSpeak 3 Scanning Problems