Error message when joining about keys being accepted

[Fusion\o/]

When I click to join a server I get this message ;
http://prntscr.com/4hdhcg

After I click ok It proceeds to join me into a server until I get this next error message which stops me from joining the server.

http://prntscr.com/4hdghk

Pls Halp

[Homer]

Try to copy the Arma 2 Addons paste to Arrowhead (it will replace some files).

[Fusion\o/]

That solved the first error message but It still doesnt allow me to join the server, it has the same error.

[Fusion\o/]

I solved it, I am noob, all I had to do was delete the files that have been duped in the addons folder, Thanks for your help!