After installing OA 1.50 I can access the multiplayer servers, but get a prompt to patch up to 1.52. Once I install this patch I can no longer access the multiplayer screen, I click multiplayer, accept the ESRB notice, and it launches and freezes on the "receiving..." screen. This ONLY happens in patch 1.52, NOT 1.50. I have reinstalled the game 3 times, and downloaded the 1.52 patch from 3 different morrors. I am using a brand new combined operations cd for both arma 2 and OA. Any help is much appreciated.