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i try to play a game and this comes up you cannot play/edit this mission it is dependent on downloadable content that has been deleted.caair_pmc_ka60.. anyone know anything?

do i have to put it in the arma 2 folder?

I dont have Arrow head yet, i got a patch but idk where to put it, im blonde dont bag me

Navy Because my uncle was in it Served on HMAS Sydney and a Sub and i do navy cadets

I try to play ArmA II online and it says Bad Server Rejected version Please help !!!!! i know this is the wrongplace to post it but i didint know wjhere to post it