[Biker1]

There is an Internet Sharing Cab that you can download that should solve your issue. You can find it in the Diamond section. Sorry about not posting a link but I am just sitting down for dinner. It can be found in a couple of different threads.
Plug the usb cable from the port of your Diamond to the port of your laptop and press internet sharing in your program menu or start menu of your Diamond. It should work but you may want to use one of the cabs below so the setting says Sprint.