Problem: International users cannot add extension licenses to ArcView GIS 3.x when using a USB hardware key
Customers based outside of the United States of America, who are required to use a hardware key for ArcView GIS 3.x, cannot license any extensions when using a USB hardware key.
ArcView GIS 3.x USB hardware keys only support the core ArcView GIS 3.x product; they do not support extension licenses.
Solution or Workaround
Use a parallel hardware key.