I have an academic account and for the student version you should have been given two things...
1. product key ... for the student version there is a specific product key
2. serial number
The product key and the serial number are tided together so if you do not have a valid key and serial combo the installation will fail.
This will also have to be activated, so you'll need a connection to the internet. There is the possibility that someone else has consumed your serial number. You could go to the academic download page and acquire a new serial. I am not sure though as they may just generate the same one you originally received. In which case there is a support option on the academic download page to report problems with the installation.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 30-04-2012 at 07:54 AM.