that means ur banned, never ever cheat without being host or u will get banned,
u got a ip ban, well i was banned a couple of days ago so i changed my static ip. just open cmd.exe and type in ipconfig/release ipconfig/renew than turn off ur pc and reboot ur router and wait a couple of hours , i did this , and i got a new ip dont know if it will work for u, but thats the only thing u can try or ask ur internet provider for a new ip.... orelse ur not gonna play this game anymore im affraid...
if ur using vista or windows 7 run cmd.exe as admin or it will not work anyway
goto www.alteriw.net go to forum and check out the cheat report section and check out if u find ur user name and ip posted there and if so if its banned or not just to make sure... i just checked and i can play...