But the game is not running as CO. Do this; 1. Run STEAM as adminstrator. 2. Run ArmA 2' date=' Quit. Then run ArmA 2: Operation Arrowhead, Quit. (THIS IS ESSENTIAL) 3. Install DayZ with Worrom's DayZ Updater, which you can download from here. http://worrom.com/files/DayZUpdater16.zip 4. Install latest beta patch, which is 1.60.93825, run it as adminstrator also, better be safe than sorry. 5. Add one of the following parameters as a launch option in STEAM to ArmA 2: Operation Arrowhead. The second parameter is the same but in different form, some reports say that some people have difficulties with the default parameter. -beta=Expansion\beta;ca;Expansion\beta\Expansion -mod=@DayZ;ca OR -beta=Expansion\beta;Expansion\beta\Expansion;CA;@DayZ 6. Download "_runA2CO.cmd" from here http://www.mediafire.com/?tju0d6s5md6y8r6 and put it in the ArmA 2: Operation Arrowhead's game folder in "\common\arma 2 operation arrowhead" and overwrite if asked. DO NOT CHANGE THE PARAMETERS IN "_runA2CO.cmd" FILE! 7. Copy & Paste the Beta "arma2oa.exe" from "\arma 2 operation arrowhead\Expansion\beta" folder to "\arma 2 operation arrowhead\" and overwrite if needed, before pasting. Make a backup of the original "arma2oa.exe" by moving it to other folder or by changing it name to something else, like "arma2oa.bak.exe" Cheers! I really hope this helps [/quote'] i didnt think it woud work, but you must be magic i love you :D