from what i have seen from others if your still having this problem. it could be that steam isn't using arma2 and just using arma2 OA. you have to use the combined ops exe. which you can get to in steam through the game library and right clicking OA. some servers have both and steam only does the OA exe unless you tell it different. for me that is. /my problem is do i want to go in and find every mod i put in arma2 and delete it so i can play some of these server...because when i do the combined ops exe it loads all the mods with it. pain in the ass really