Nostalrius Begins - Quality wow vanilla realm (1.12)

really its all in the topic i was in darkshire fighting skeletal mages and i kept gettin disconnected and the authenticating would take awhile then work but now it just wont stop my connection is good i dont understand what to do for this please help

This happens to me sometimes as well. Usually you will be stuck at "Authenticating" or "Retrieving Character List" for about 5-10 minutes. Did you by chance notice how many players were on the server at the time?