I've had this issue crop up if you are holding your map in a new folder, other then the main ones that wc3 starts with (i.e. download / main map folder / test)
Try putting your map into one of those, see if it helps at all.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!