Yeah I can't log in either. The game just randomly went to the log in screen with no error or anything while playing. Oh well.
Exactly the same thing happened to me, whilst i was in the middle of fighting four mobs. Will be a bit of a lottery when a log back in

I love the Necro so far, mainly use axe/horn and staff. I have insanely high lastabiity in both PvP and PvE. Takes a while to get the hang of it though, since it's not really a high DPS class.