ChemicalSociety

I have no problems running Arma 2, but when I try to run OA I first receive this error "No entry 'bin\config.bin/cfgIngameUI/MPTable.shadow' then the screen goes black, like its about to load the game and I get this error: "Error compiling pixel shader PSSpecularAlpha:0" Does anyone have any suggestions? I scoured this forum, but didn't find what I was looking for. Any help would be much appreciated.