iTunes file not downloading

[EVOLElectra]

Hi,

So today I decided to finally download some of my iTunes music onto Spotify Mobile, so I can put them in playlists together with other music!

Everything went fine, except one file which wouldn't show up on my iPhone. It doesn't appear grayed out on desktop, infact it's just a normal file in terms of desktop. But when I went to download the playlist it's in on my phone, every song except this was there, and I can't find it anywhere.

The playlist contained both local and regular files, for reference.

Please advise! Thanks.