I've been having some this problem. I tried re-installing Arma 2 off of DayZCommander, and at the end it says "Wrong CD key". I bought DayZ a few months ago, and finally got my new computer about a week ago. I downloaded the game today and was able to join 1 server. Trying to join another I got the "Bad Version, Server Rejected Connection". I did what Steak And Potatoes said to do perfectly, and it didn't do anything... I'm fine for now that I have the one server I can play on, but like, what is going on wrong? In the DayZ server browser on the actual game it says version 1.62 in red and the servers 1.62 in black. They are the same, so why would it be red? Anyone?