[Plugin: WP e-Commerce] Shipping option for UPS Ground not working

In admin, when I have the following settings, UPS rates don’t appear at all. Not at all.

Destination: Residential
Packaging: UPS Letter (I also tried changing this to the several express boxes selections; same results)
UPS Preferred Service: Ground (and only ground is selected)

UPS Rates – Gone. It does not appear.

If I deselect “Ground”, the UPS Rates come back, but only display the following, with NO Ground:

2nd Day Air
2nd Day Air AM
Next Day Air Saver
Next Day Air
Next Day Air Early AM