#0 - Sept. 26, 2010, 3:07 a.m.
I have upgraded my account to wotlk, and have been to dalaran, even made it my home. Recently, I have been unable to go to Northrend, by hearthstone or zepelin. A message always pops up that says "You must have WOTLK installed to access this area. I have checked my account management section on battle.net, and i see that my account has been downgraded to tbc version. I have tried re- entering my product key, but obviously, it has already been used. Any help on this issue?