The files listed(I've underlined them)are not accepted by the server, you need to delete them.

Go to - "C:\Program Files(x86)\steam\steamapps\common\Arma 2 Operation Arrowhead\@Dayz\addons"

And delete the files I've underlined and it should let you into the server.

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I followed all your steps but on most servers a big list still pops up :S

Iker-Casillas wrote I followed all your steps but on most servers a big list still pops up :S

Just to make sure, delete all the files, inside the "Addons" folder, the game will re-create the needed ones.

Also, do you have any Addons/mods installed? if you do, remove them, as they will more than likely not be supported by the server.

The only addons i have is Arms 2 : British armed forces And Arma 2 Private military company

When i join a game it says all of this

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Iker-Casillas wrote When i join a game it says all of this

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Does that stop you from playing? or kick you from the server?

If it doesn't, then it't nothing to worry about, happens to me all the time.

Yes it kicks me from the game session

Iker-Casillas wrote Yes it kicks me from the game session

you're missing needed files for the server, what server is it you're trying to join?

Im just trying to join populated servers but all of that writing keeps popping up