Hello, I recently bought Arma II and Arma II OA via Steam, installed and played it succesfully for a couple of days untill i bought a new harddrive (purchasing a new harddrive had nothing to do with Arma but I'll get to it). Anyway I download Steam and attempt to install Arma II and Arma OA on my fresh Windows 7 but as I finally downloaded all the files for Arma II and OA I am unable to start and play Arma II OA, altough Arma II works perfectly I get the following error message when I attempt to start Arma II OA via steam - "No entry 'bin\config.bin/CfGInGameUI/MPTable.shadow'.
Then the screen flashes black and I get another message - Error compiling pixel shader Psspectular Alpha:0
After these errors nothing else happens, I have tried to reinstall and even download all the files again but it still won't work, the only exception was that sometimes I would get an error saying something like: "bad serialnumber given".
So my question is how to I get my Arma II OA working again? Steam support redirected me here so I hope you can help me solve this problem since it's very frustrating not being able to play a game I bought for my own money...
Sincerly a Arma II fan.
