set your realmlist to kpsden.com and only update when it tells u and u will not have any further problems with this issue delete the patch run wow repair and then u should be fine to get back on
Mangos revisions always lag behind retail revisions, since the retail revision has to be released before mangos can make adjustments and release theirs. If you also play retail, you'll have to downgrade to play on the den, or make a different wow directory and leave one at the later version.