How did you install the product? When you install there is an option to
install a single seat or a networked installation. During the install were
you prompted to supply your serial number?
This is how the lower left side of my "About" dialog reads:
Autodesk Inventor 7
Copyright 1996-2003 Autodesk, Inc.
Build: 275e, Release: 7 RTM - Date: Tue
04/09/2003
Usage Type: Commercial
License Expiration: No Expiration
Serial Number: 123-45678901
License Behavior: Permanent