I bought combined operations off of steam 4 days ago, since then ive been trying to install the DayZ mod. Ive read various guides and tutorials but even though i follow them step by step i dont seem to be able to join a server. whenever i go to join a server when its loading it stops abut 4/5 of the way through. the game goes unresponsive and i cannot see where i am going wrong. any ideas?