Ok, so today I just bought ARMA II and ARMA OA from Steam. Everything just finished downloading. I went to DayZ, clicked play with ARMA OA, it loads almost all the way, but it stops and gives me these errors: Error compiling pixel shader PSSpecularAlpha:0 and No entry 'bin\config.bin/CfgInGameUI/MPTable.shadow' Also, when I try to run DayZ with ARMA OA Beta, it loads, but tells me, "bad serial number given in setup". But I was never given the chance to put in a serial number anywhere... Please help!