Can't start Operation Arrowhead

[Tdabamf1 1]

Well, I have recently bought Arma 2 and Operation Arrowhead of steam. I started it and I get a error saying,

"bin/config.bin/CfginGameUI/MPTable.shadow'"

So I click "Ok"

then the game is about to launch and I get a error saying,

"Error compiling pixel shader PSSSpecularAlpha:0"

I don't have any mods, or anything. When I click "OK" the game just closes. Arma 2 works fine, but no Arma 2: Operation Arrowhead.

Thanks, please help.

[hardway 1]

I had the same problem. You can solve it by doing this:

shut down steam full. you can do dat by clicking on the steam icon on the right bottom in your screen (mayby you first has to click on the little arrow) witht your right mous button. select shutdown at the bottom of the list. When it is complete shutdown you start it up as an administrator (right click on the big steam icon on your desktop and run as administrator) that should be the solution.

Sorry for the bad english it's a little bit hard for me.

if somthing is'nt clear feel free to ask