I've transferred an album of songs to my Walkman MP3 (Windows Media Player confirms they are definitely on the player) but when I flick through the contents on the player the album doesn't appear. I've tried looking under Artist and Album but it doesn't show up in either. I haven't had this problem with other transferred albums. It's a standard CD album (not a copy). I'm very perplexed. Any ideas why this is happening and how to make the songs playable? Thanks in advance.