i have window 7 and it won't let me online with combined ops. I have set firewall access to full ( i have done this with Macfee as well). When i go on the game it says that i can only choose "host a new session". I have reinstalled both arma 2 and oa but it still won't work. It worked before when i had just oa but not when i add arma 2. Can anyone help. thx in advance.