wrong version of server side application?

[oo7651 0]

Hello, my name is cole and i have been playing dayz for a few weeks and i just died on one of my favorite server and it gives me this message- This server is running an incorrect version of server side application. You can not play on this server. if you are the server admin contact dayz staff. This popped up after i tried to respawn. Can anyone please help me i really like this server and i have some good lot on it. Thanks and by!