Actually our KoP disc did not come with the numbers printed on it either. I emailed AutoDesk about it and they said that there was a 'glitch'. Have you registered with AutoDesk? If not go to this link
http://students.autodesk.com/?nd=form__240
Register and then when you login there
should be two links, one to download software and the other to "Get serial number and product key". Click the link and it should provide you with the info you are looking for. This is the process we had to go through to get the numbers for our copy of Inventor anyway...