Aperture serial number problem when migrating to new iMac
I recently purchased a new iMac and got the Apple store to transfer all my data/applications from my old iMac to my new iMac. When I start Aperture it asks for the serial number. When I type in the Apertuare 3 upgrade serial number it asks for the original serial number, so I type in my original Aperture 2 serial number and it says it is not a valid serial number. Please help
Aperture 3, OS X Mountain Lion (10.8.2)