Alright, there has been a map glitch lately where custom maps havent been working to the best of their ability, and they dont allow people in for a short while. This will be fixed soon enough, though instead on deleting the map file, log into the forum here, and on the right hand corner is a button that reads"reset character" all you need to do is press that. Then press reset home on the character you want out of the map.
Sorry about this inconvenience, hope this helped, if you have any further questions just ask!