Same problem. Redhammer - Nost PvE, Iamsmash - Nost PvP. 
  
Symptom: If I am able to log in and go straight to either server with no queue, then the game disconnects in a matter of seconds. 
  
I did notice last week that sometimes I can force a queue by switching between servers after authentication, then I would stay connected.  
  
Otherwise, if I manage to login and go straight to ether server (with no queue), I disconnect after approx 2 seconds.