CS6 update will not take my CS3 serial number
I paid for the update for CS6, moving up from CS3. I paid the $300, downloaded, installed, input the serial number for CS6. The screen then asks for the CS3 serial number, I put the number in at least ten times (no typo's) tripple checked "My Adobe" again and again. I have the correct serial number for CS3, but upon validation of "Serial number upgrade", after choosing CS3 from the dropdown menu, I input the number, and it keeps saying, "This serial number is not for a qualifying product, please try another".
Thanks so much in advance for any help