Winamp skips over songs
 

I just downloaded Winamp and everything was working fine until I started adding even more music to my library.
When I click on one of the new songs I just added it skips that song, and every new song after that, and will only start playing a song that was already in my library before.
When I go to the folder where the new music is and click on "Play In Winamp", it plays fine, just not when I actually click on it in my Winamp library.

I am also using Windows Vista, though I'm not sure if that has anything to do with it.

Winamp doesn't play songs from the library, it plays songs in the Playlist Editor. You can select a song and hit "Play" to play it now or "Enqueue" to add it to the playlist to play it.

When I select the song and hit "play" it skips over the songs. When I click "enqueue", nothing happens. All of the other music from my "local media library" plays fine