I've been playing Ace of Spades for a while now, and I've had a break, only to come back to this same message when I try to join a server. I slated my old AoS files, and re-installed it back to vanilla, yet no change. I live in England, in case it has something to do with were I live.
If you need more details I'd be more than happy to provide you with them (not my address pedos).