Connection Failed while playing Multiplayer (working fine before)

[Major Killer 10]

Hi, I just bought ArmA2 and it is an awesome game except for a few bugs here and there ;). About 20 minutes ago the multiplayer worked fine and was connecting properly (except for the stupid receiving bug) and just now my game froze while in multiplayer and now every time I try to connect to a server it immediately says when I press join, Connection Failed. Like I said before, everything was working fine before. Any help would be appreciated.