Windows 7 A game i only have had issues with since 7

[Zanno]

The game is grand chase the only game i have had issues with is Grand Chase. I can run most anything else but as soon as i try and run this game and it passes game guard the game crashes seven and i have to restart. Anyone got any ideas on what may be a problem. I have made sure update bios and everything else before updating to windows 7 32 bit ultimate edition