I bought Arma 2 Combined Operations from GOG yesterday and just got it installed couple hours ago. I've been messing around in Bootcamp for a while and decided to go online. Online I go and all I get is some kind of "Global Ban a796" or something. I decided to forget about it and continued the Bootcamp. Then I decided to install DayZ, so, I installed Play withSix and installed the mod from there. Joined a server and the same a796 message again. Then I searched online and turns out I didn't register my serial number. So, I ran the GOG serial register and it registered the key for me. I can see it in my registry under KEY. However, now I get a "Key in Use" message when I join a server. What does that mean? The sticky says that it happens when you install some kind of key stealer or hacks but well, I didn't install anything apart from the game, the mod installer, and the mod itself. Maybe there's a step I missed?