dog994

Okay so i just bought the off of steam 2 days ago and it has been troubling me. To start off is Arma 2 so everything in this game is fine and up and running the only problem i have is it says i have an invalid cd key which i dont get because i bought the game. The second and main problem is Arma 2 OA is the first error was Bad serial number and it kept doing that but i fixed now it gives me another error "Error creating direct3D graphical engine" some please help.