Hi
I have a problem, 2 days I no longer scans servant tells me:

"Please ensure that this server is currently up and running and is not firewalled.
Please verify and update the following information if it is not correct:

Query Port: Game Type:
If you are sure that this server is up and running, is not firewalled, and the query port/game type listed above are correct please visit the GameTracker Forums to request additional help."

Until two days ago we had no problems
What should I do to go again ?

Please first check into the changes you or your server provider made that could have an effect on the scanning, then undo those changes to check to see if it was the cause.