Help please. Post PT 8 Install all plugins from past sessions are missing!

[Buster1]

Hi,

Just updated to Pro Tools 8 and I'm pumped. However, I open Pro Tools 7.4 sessions and all of the inserts and send effects I had dialed in are now missing. I want to be clear. All of the inserts are just blank. I still have the ability to insert them but the previous work I had done is gone.

Please help if you can.

Thanks,
Buster1

Computer model and processor speed Mac Book Pro 2.4 GHZ

OS version OS X 10.5.6

Pro Tools version Pro Tools 8

Amount of RAM installed 2GB

Any attached peripherals (hard drives, video devices, other firewire or USB devices that may be attached, etc) Lacie 500GB Firewire 800 external Hard Drive, Mbox

Number and type (firewire, SATA, SCSI, etc) of drives installed : 1

Which of the drive(s) are being used for recording and playback : Lacie used for recording and playback

A concise list of the troubleshooting you've already tried - please be as specific as possible! I have all up to date plug ins.