Hmm, everything seems to be in order there. Is the .fhm file in there? Perhaps mediafire did something and deleted files; it's never done that before, but who knows, there's a first time for everything.
If that's not the case then, do you have a lot of maps downloaded? It might be somewhere where you cannot get to it if that's the case. If that's not it either, then I'll re-export the map and put up a different download to see if that helps.
If all else fails, then you might need to ask for help in the help section.