Song not showing up in Windows Media Player?

I just downloaded this song from Mediafire and it wouldn't show in my WMP library.I'm on a Windows 7 Home Premium.I've tried various methods including downloading the song again and the one stated here http://answers.microsoft.com/en-us/windows/forum/windows_7-sound/songs-do-not-appear-in-the-windows-media-player/a6e80b2e-7367-4529-9dab-5a38ba4167a5 but it just wouldn't work.