Not all songs on playlist are syncing to ipod touch?

[gadgetgirl85]

I have recently formatted my computer and put all my mp3s back on from my backup on time machine. I am now trying to transfer a playlist to my ipod touch but not all songs are syncing from the playlist? I have authorised the computer for my purchases. Any ideas?

 

[Latro]

did the location of the files that the playlist references change? You may need to rebuild your playlist.

 

[DoFoT9]

probably not in the right format