PLEASE HELP! This game will not load; i am getting two ERRORS

First is says "no entry bin\config.bin/CfgInGameUI/MPTable.shadow"

Then the screen turns black and says "Error compiling pixel shader PSSSpecularAlpha:0"

WTF. I am not a PC wiz at all. This and Arma II are my first pc games i ever bought because i want to play DayZ. I have the requirements because ARMA 2 RUNS FINE!!!! I can play that game all i want.

I juswt want to play DayZ..... But i cant if OA wont even load.

I have not downloaded any mods yet.... i dont even know how.

Please, for the love of God, help me out. I spent 40 bucks on this. PLEEEAASE

---------- Post added at 16:08 ---------- Previous post was at 15:50 ----------

After like an hour of frustration, I turned off my computer, set steam as admidinistator, and IT WORKED!! :)

HOW DO YOU SET STEAM AS ADMINISTRATOR? im gettig the same error! please help!

Try launching ArmA from the ArmA directory. In "C:\Program Files (x86)\Steam\steamapps\common\arma 2"

HOW DO YOU SET STEAM AS ADMINISTRATOR? im gettig the same error! please help!

When you are about to click on Steam Icon, right click on STEAM.exe then choose run as administrator :)

OMG!!!! thank you it worked! gonna install the Dayz mod now!!!!! I love you! ( no homo) =)

HOW DO YOU SET STEAM AS ADMINISTRATOR? im gettig the same error! please help!

Please stop writing in all capital letters, which is considered shouting - which is not necessary here and makes you only look like one of todays typical kids. :-)