I need help with Arma 2. Please help me!!!

[mike32 3]

hey guys so this is whats up, Arma 2 runs fine and i can play it fine.

Then i try to load Arma 2 OA because you need to load both up to then run day z right. so then i get a error saying something like (,bin/config\ui\shadow) that's not it but its sorta like that. then i get another error and then doesn't let me load operation arrowhead up.

i have tried running in administrator and that fixed Arma 2 but not operation arrowhead.

Anybody got anything else that works i really don't wont to waste 30$ on this so pleaseeeeeee help me out guys i just want to play a great zombie game :(