Cubase 6 AI Education upgrade to Cubase 7


I have Cubase 6 Elements EDU version and i went to buy Cubase 7 full version. However, I purchase Cubase 7 Elements Upgrade from Cubase AI 6/7 and it didn’t seem to work and I receive the following message when i try to activate:

“No License To Upgrade Selectable, no license found. Please connect a USB-eLicenser which contains an appropriate license to upgrade to your computer”

Is it possible to buy Cubase 7 at a discount since I’ve owned Cubase 6 EDU and now I’m ready to take the next step?

THe link below is the queue to purchase which shows my selection upgrade from Cubase AI 6/7.