USB Tether help???

[Cbones]

I can tether via BT through Internet connection sharing, I can tether via wifi, but if I try to tether using USB, I can get all the way up to the point that the laptop is looking for an IP address, and then it fails and I get a 169.xxx address which is obviously useless. BTW I have tried telling Activesync to allow USB connections as well as not allow USB connections, and no difference. BTW I have the latest WM6 ROM and AS 4.5 installed, and it works just fine either over BT and USB. Before I had WM6 it worked over USB and BT just fine. Any suggestions greatly appreciated!