Seems pretty simple. Downloading the file either via the game or from the website didn't work. The game kept trying to download the file and failing. If my memory is correct, the .fla file was not there.
Putting in the correct files fixed the problem right away.
I'm leaving out the 3 hours I spent uninstalling and reinstalling the map, then the game, finding an old copy of the map file, chewing my fingernails off, developing a nervous twitch, then throwing my computer through a window and trying it all again.