When I reinstall in my new iMac Photoshop CS5 I get the error "The serial number you entered is valid, but a qualifying product cannot be found on this computer"

I have my Challenge code to unlock my serial number.

If I didn't have my serial number in the past or my product was not qualified to upgrade I couldn't buy the product and I can send the original purchase order.

The real problem is that I'm using a different email account.