Disconet from server

[Infinion]

Every time when i complete a quest i get disconect from server what's wrong

[Valas Azuviir]

About all I could find was this post (http://forums.worldofwar.net/showthread.php?t=347234&highlight=quest), and this bit here (http://www.blizzard.com/support/wow/?id=aww01679p). Hope it helps.