As far as I know, all the Uniden scanners use a serial interface, not a USB interface. I'm using several USB to Serial converters made by Manhattan Computer Products, which work well and just happen to use the same drivers as the Uniden USB to BCD396T, BR330T, BC246T, BCD996T, etc. Cable. (all the new ones after the BC296D/BC796D) You probably either need the most recent driver for your converter, or you need to look in the control panel, under system, hardware devices to see which serial port the USB converter is. If it is out of range (too high) you can change it to a lower numbered serial port.
Mark (from up north of you)