roseonlinegame/gameguard

Hi Guys can anyone help us ???
we play roseonline game and yeaterday Avast is saying malware on game guard so we have to abort Avast now to log on some thing to do with rootkit any suggestions please
says this Win32:Rootkit-gen [Rtk]
C:\Program Files\Triggersoft\Rose Online Evolution\GameGuard\dump_wmimmc.sys