Some servers might take a long time to appear on the master list. I got this too on my server.
There is no problem with your server.cfg, but try to replace this lines with your lines.
It's worth a try tho
Code:
set sv_master1 "cod2master.activision.com"
set sv_master2 "master.gamespy.com:28960"
set sv_master3 "master0.gamespy.com"
set sv_master4 "dedifrag.com"
set sv_master5 "cod6authorize.activision.com"
set sv_master6 "codmaster.activision.com"
set sv_master7 "coduomaster.activision.com"
set sv_master8 "master0.gamespy.com"
set sv_master9 "master1.gamespy.com"
set sv_master10 "master.gamespy.com:28960"
set sv_master11 "coduoauthorize.activision.com"
set sv_master12 "master0.gamespy.com"
set sv_master13 "dedifrag.com"
set sv_master14 "codmaster.infinityward.com"
set sv_master15 "codauthorize.activision.com"
set sv_gamespy "1"
Also, make sure that you have a cracked server.