I have a Cs 1.6 Server on Gametracker it was fine till yesterday it had rank 9000 when it was showing then offline but the server is online when it show me those errors :

#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:
#27015
# Game Type: UPDATE SCANNING PARAMETERS
#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.

but its not working i dont think it has to do something with firewall because it was working i just tried other gametrackers just to test and it works on other websites i need help because my rank is droping

Server ip : 51.255.199.40:27015

You need to double check your port settings, and then confirm that your firewall is white listing the IPs in this list;
http://www.gametracker.com/forums/forum.php?site=1&thread=108247

I can see that the server is up and running (..:: Extreme Gaming Server ::..), so it has to be something else at your end.