Monksnothome

Can someone please help me with this. I have been doing everything i can for the past three days now trying to get the DayZ mod to work. When ever i join a server it says remove listed files, or install additional keys. I have removed the files and it asks for the same files after i deleted them from my computer. Here is a screen shot of the error i get trying to join DayZ Epoch Namalsk server. Please can someone help me!!!!!

This happens for any dayz not just epoch even just the DayZ Mod itself do you know how to fix the error.