Stuck on 'Waiting for host' bug

[cragimus 0]

Can anyone help me, I was playing DayZ fine and left my computer on for about 4 hours, then came back and when ever I tried to join a server from the WithSIX I always get stuck on a 'waiting for host' loading screen, which never actually loads... And if i click on multiplayer on the DayZ mod no servers show up. :/ Any help would be appreciated, really want to play this game again. Thanks!