addon 'CAMisc_fix_str' requires addon 'CAStructuresHouse_A_Office01'? Please Help!

[Zekn 2]

i downloaded The Arma 2 DayZ mod on Steam can someone please help me? When i start up the mod it says addon 'CAMisc_fix_str' requires addon 'CAStructuresHouse_A_Office01' please help! after that it also says Bad Serial number given but that may be caused by the addon error at the beginning if not than i know how to fix it

[Zekn 2]

SOMEONE PLEASE HELP

[byrgesen 1341]

Did you run Arma II and Arma II OA at least once before you booted up DayZ Mod?

Try to verify the game cache on both Arma II, Arma II OA and DayZ Mod, assuming you have all of them on steam.

[kichilron 8550]

You actually need to buy and install both ARMA 2 and ARMA 2: Operation Arrowhead. Just the 200 MB of the DayZ Mod just won't cut it.