Map won't open?

This is very strange. I can open my map just fine, but when I e-mail it to my friend, he says that he can't open it. I've told him that he needs to use WEU, and he has. The problem is, even though he's done all he needs to do in order for the map to open correctly, it still says that he can't.

Does anyone know what's wrong?

What do you mean he can't? Like its missing some file or something?

Either way, if need be, just open it up with WinMPQ and extract the files into a new map and see what happens. Alternatively, since you said it would work on your computer, extract the data using WE (which is probably more fail-proof) and see what happens.

Try making sure your friend has the correct version of Warcraft III if he has only Reign of Chaos he cannot open it. He should have The Frozen Throne and the latest battle.net patch.