Region Issues With Logic 7, Invalid Regions Options

[maestro254]

First my system is a 17" G4 laptop, MOTU Traveler, Lacie 250 gig harddrive, Grace 101 mic pre, TL50 compressor. Blue Baby Bottle mic, etc....
I recently recorded vocals in Logic 7 onto the Lacie but every time I save the project and come back, when loading the song it says--12 Invalid Regions---
or ---whatever # and some of the parts are misplaced or arranged differently in the song......What am I doing wrong and how can I correct this problem....Some one please help.....