Guild Wars 2

I had a group who did it last night, about 12 hours ago, most of us had not done this dungeon before and we still beat lupicus. Only one guy i had to go all the way back to the closest waypoint but we still did it in 3 tries. (2nd try he followed me out the door, I didnt know he would reset) He honestly isnt hard, just has a big health pool

Currently unplayable for me for about 2 weeks.
On underworld server, every map is laggy for me, and I get kicked out all the time.
Live in Lincoln UK, rang internet provider and they said connection was fine, which it is with every other pc game and also xbox live and downloading mostly at 3mbs.
Tried everything mentioned in this thread, still nothing.