Getting a simple map to load

[Demoman Dawkins]

http://wiki.frictionalgames.com/hpl2/start

I've watched the videos on there and even though I know exactly what the guy's doing, when I save the map in the editor into the Custom stories folder, I can't see it in explorer. I can re-open it in the editor, but even if I enable show hidden folders, it just won't appear.

It only works If I save it to desktop first, but even then after following exactly what the guy does, it won't show up under the custom story menu in Amnesia.