Help Please - M-Audio FastTrack/Pro-Tools M Powered

[The Shamrock]

Hi all

I'm new to the forum and new to the game of M-Audio FastTrack/Pro Tools and so I hope someone can help and forgive my ignorance!

I recorded some songs from our practice session, hooking up the FastTrack through the PA and USB into my laptop. The recording worked fine, all on one track and playback was fine when listended back initially. After first song was recorded I saved the session and to save time I then just clicked 'undo' recording, recorded our next song and then saved that session but under another name and continued that way until all recorded.

All the sessions have been saved seperately but now when I re-open them in pro-tools - the track is missing and it says something along the lines of 'Relink audio' and can not seem to find the recorded track relevant to that session. The only one that plays back is the last song we recorded.

How can I retreive the tracks/songs? Any help is greatly appreciated.

Cheers