Did you use the BackUp/Restore option within ProSeries to backup the files to move them?  or did you only copy the files in Windows?

Its been a few years but I believe you need to use the BackUp/Restore option within the software to get the PPR info to carry over.

Do you still have the old system?   If so, you can just delete the ones you copied over and go back to the old system and use BackUp/Restore and get them into the new system that way.