Cannot Play, Error

[Creation (DayZ) 0]

When I try to join a server I get this error message.

You can not play/edit this mission; it is dependent on downloadable content that has been deleted.cherarus

I have bought Operation Arrowhead on steam and I just downloaded the Arma II Free off their site. I put the Arma II Free inside the steam folder.

Can someone help me, what do I have to download or have I put something in the wrong place?

Any help is appreciated,

Thanks!

[Allie (DayZ) 97]

Arma freed oes not work for what you want.

You need ArmaII and Arma Operation Arrowhead, you have to buy them, then download the Mod and off you go.

Use Dayz commander to update the games and Dayz.

Or use the SixUpdater.

Arma free is not an option !

[Creation (DayZ) 0]

It works on my other computer and for all my friends? Why can I not use it :/