Files... not signed by keys accepted by this server?

[MoistFlute 0]

Hello. I have an issue. Whenever I go to join a server, I receive a message and I am kicked from the server. It tells me that the files, "C:\Users\MoistFlute\Documents\Steam\SteamApps\common\Arma 2 Operation Arrowhead\@dayz\addons\community_crossbow.pbo,C:\Users\MoistFlute\Documents\Steam\SteamApps\common\Arma 2 Operation Arrowhead\@dayz\addons\dayz.pbo, C:\Users\MoistFlute\Documents\Steam\SteamApps\common\Arma 2 Operation Arrowhead\@dayz\addons\dayz_anim.pbo, C:\Users\MoistFlute\Documents\Steam\SteamApps\common\Arma 2 Operation Arrowhead\@dayz\addons\dayz_code.pbo..." are not signed by a key accepted by this server. And it appears to tell me this for pretty much EVERY Dayz server. I deleted these files, all of them, but it still tells me I have them! I keep getting kicked from the game because of this. What should I do?

 

A link to the screenshot I took in game: http://steamcommunity.com/sharedfiles/filedetails/?id=297416377

 

All the files listed there I deleted, but it tells me this.

[FrostyKush 44]

Redownload dayz mod if thats what you are playing, also make sure you are joining a server running the correct version.