Your directx is probably outdated, well, the only tip I could give you is updating your directx, microsoft is your best look: http://www.microsoft.com/en-gb/download/details.aspx?id=35

(I'll probably add a picture once I find a suitable one)
Yeeaaah, just came to drop a introduction of myself; I'm currently in high-school, Grade 12 (6th Form), aged 17... I've played GunZ some time...