"Wrong CD Key" Installing Beta Patchs.

["Wrong CD Key" Installing Beta Patchs.]

Hi, i have bought a steam ARMA 2 CO game and when i try to install beta patchs i get "Wrong CD Key" error. I already reinstalled Steam, ARMA 2 and still getting that error.

[How to Set Up DayZ Private Server]

Hi all, i'm trying to set up a DayZ private server at my home pc. But it seems to be very hard. Can anyone help me?

I have Steam version.

[Buy the CD Key and now?]

Hi guys, i have buy the ARMA 2 Combined Operations CD Key. How do i use know? Where i download the iso to install?