Can't join a server?

[shadowdude 0]

So i'm using ArmA 2: Free and ArmA 2: Operation Arrowhead

I'm making sure I run steam and ArmA as administrator

And I make sure i load the game as Combined Operations

Yet whenever I join a server it still comes up saying 'You can not play/edit this mission; it is dependent on downloadable content that has been deleted.cherarus'

And yes I have put '-mod=@dayz -nosplash' (without the quotes) in the Launch Options

So yeah, I'm stumped

Any help here?

After using the search feature on this forum I still haven't found an answer...

[butterbladez 0]

you cant use arma 2 free

[shadowdude 0]

Really? I have read in quite a few places that ArmA 2: Free just means you don't get the higher texture pack.