When you plugged in the ND-100 to your computer (using the provided extension cable), does the blue light blink or is it just steady on?
Plug in the device to your computer and check the port used in the Device Manager. Run the GPSInfo program as an administrator (refer to the previous post). Select the com port and baud rate and click on Start GPS. You should see some scrolling data on the window below. If that doesn't work, close the program and unplug the device. Open up the utility once more, follow the appropriate steps, and choose a different baud rate.
Let me know how it goes.