Setting AlbumArt of AudioTrack

Question

I'm using Background Audio Player on Windows Phone 8 and I'm trying to set an album art for my audio track. As I've read here and at MSDN the image MUST be at shared/media/ - ok I've checked the image is there and I try to do:

AudioTrack myTrack = new AudioTrack(track.source, track.Title, track.Artist, track.Album, new Uri("shared/media/Episode29.jpg", UriKind.Relative));

The music starts, but there is no image. Am I doing something wrong?

I've also run Background Audio Player Sample mentioned here at MSDN and I also see no image.