Silver

Weird... Since before i haven't done any changes, nothing have been updated, except a few regular win-updates, but today it just worked perfectly, no errors whatsoever

I'm using Steam. I did a filecheck, and it did find one error, but it didn't do any difference. Also tried reinstalling it, but same problem still. About the shaders, i thought about that too, but since i can run Arma2 just fine, don't they use the same graphics? Everything is fully upgradet, and i tried both the normal and beta version. Cpu: Amd a6, + amd 7670, 8gb ram, hitachi 750gb disc, win8 x64

So, just bought Arma2 CO. Tried to run Arma2, and it is just fine But when i try to run Arma2 OA i first get error during loading: "No entry CfgWorlds", but seems like i can still continue. When game is about to start, i get the error message: "Shaders Not Valid (mismatch of exe & Data?)" and then the game exits. What can be done about this? thanks