gerbilkill

i feel defeated i bought and played arma combined ops ,on my alienware m11x, my two desktops 1(gts 450) 1(9800 gt) ,, all worked fine even played lan with a buddy a few times, i ordered a 480 gtx ,decided to buy arma x on steam which came with all series games , i get to installing OA (operation arrowhead) and it keeps telling me bad serial givin in setup i dont even get to imput cd key what the fuck ,i wish bothesda made arma ,, then i would have no concerns,but we all cant have what we want the fact that someone went to school to be a computer program designer , but that does not mean that he knows what he is doing ,so if anyone knows what might help me please hit me up ,,,vag out gerbilkill@live.com