problems with Aperture DVD serial number

I have Aperture 2 and 3 serial numbers on my files and the Aperture 3 box that I bought from Apple shows only stickers for two equal serial numbers labeled Aperture Upgrade V3.0. The installation rejects those as being for an upgrade and requests the original. The previous ones I had on file do not work either. I am actually in the process of reinstalling the OS and cannot install Aperture due to this problem. I do not remember how I handled this problem for the initial installation, which was not easy but finally worked.