[jfolliard]

try this - works for me

Start off by NOT connecting the USBcable to your laptop.
1) Connect to the internet on your Mogul via IE or ActiveSync so that your phone is connected to the Sprint PCS connection via #777.
2) Click the Start button > Programs
3) Open the Internet Sharing program
4) Choose "Sprint PCS" from the Network Connection options
5) Click the "Connect" softkey and the status should read "Connected" or "Check USB connection"
6) Connect the USB cable to your laptop and the Windows Vista network and sharing center will automaically detect the network connection after it loads the needed drivers.
7) Manually disconnect the usb cable BEFORE closing Internet Sharing window.