Problem with license configuration (Creo/ProEngineer Wildfire 5.0)

While attempting to install a student version of Creo/ProEngineer Wildfire 5.0 from online I encountered a problem with the license configuration. I have an valid user account and internet access. I entered my PTC username and password on the License Configuration page of the setup.exe. The instructions then indicate for me to select the "Generate License Files" radio button, however, the username/password fields as well as the selection button is grayed out and doesn't allow me to proceed.

Any help would be greatly appreciated.

William Duncan