Guild Wars 2

Ok, for few days i experience following error: I log into game, load map (heart of the mists) everything goes smooth. After that, I queue for not ranked arena, queue after normal time pops, I check for readiness, I vote for map, 3, 2, 1, game disconnects.
Screen is all white and message pops that this problem might be caused by firewall settings. I double checked my router, my firewall – nothing wrong there.

This often repeats when I try to reconnect. I load to HotM, game redirects me to PvP map (I only manage to see load image for 1 second) and it goes off again.

Problem is – It is not 100% of the time. sometimes I play or reconnect without any interruption. But once or twice a day I get bad stroke and it happens.

Update on the case if anyone follows it:
I managed to write down some of the error codes I recieve during those unfortunate events:
1008:1:561:101
and these three happened just moment ago, in a row:
42:0:9001:4409:101 (this one in game)
7:11:3:191:101 (this popped on character select screen, after dc)
3032:1002:3:304:101 (this one popped every time I tried to log on character)