Both PC and BB are connected just fine. Packets sent, but 0 received.
Tether version 1.4.4.0 on BB
Tether version 1.4.3.7 on PC
Reinstalling both Tether on PC and BB, checked.
Rebooting both PC and BB, checked.
Disabling all network adapters on PC, checked.
Tried on several PCs, checked.
Anything else I could try first before I ask for a refund?