Game graphics crash

[Molskahtaja]

Hello

Ever since I began playing Men of War I've randomly crashed and I don't see why. I'm running
Intel Core 2 Q9550,
8GB of DDR2,
HD4870 512Mb with latest 11.1 drivers,
Asus Xonar Essence STX sound card &
Windows 7 64-bit

Graphics are set to maximum but don't seem to affect the occurence of error. The error is not supposedly in background programs since I crashed the game the same way after I reinstalled OS and installed only drivers, steam and the game through steam.

Here's a screenshot what the error looks like
http://img171.imageshack.us/i/mowtearing.jpg/

I'm guessing the error is either related to steam pop up of key-code or then it's a graphics card issue.

Any support would be welcome