Cant join a server, Whenever i do, brings me to main menu!

[Suspect24 0]

Well, I've been experiencing this since the first day of play DayZ, When ever i find a new server i like and all, first few hours im playing on it without logging out i can play on it and all later on all the servers suddenly stop working. What i mean is i try to join the server, it brings me to the loading screen then the main menu. Anybody help me please :/?

 

Thank you