Doesn't work for me either. Placed it right next to my BBC Sports pack, which works fine. Things I noticed after a quick comparison to the BBC skin though...
No XML file in the root directory.
No screens directory.
A new (as does not exist in BBC skin) fonts directory.
Changing the name from fm2008 to something else (I used "newskin") and there was no option to select a "newskin" from the skins dropdown box. Until that is, I copied in the xml file from the BBC Sports skin, edited it a little bit to reflect the details of this skin, and then I could select "newskin" from the skins dropdown list.