I would guess your device is not properly installed on your system.
Did you get "Found New Hardware" stuff when you insert the device into a USB port?
If Windows can not find driver for the device automatically, you must manually install it, either by using a driver CD that may have come with your other computer, or by downloading a driver file from YUAN.
In general, these tuner devices are quite universal. They should work on any computer that meets its hardware requirements. However, it is important that you install the driver successfully.