USB AF – RJ45 Adapters, No Connectivity

Bought a couple of Female USB to RJ45 adapters
http://www.greennet.ca/shop/images/pictures/CNT.USBAFRJ45_M.jpg so i could network a 2nd computer to my cable modem that has a usb port.

Connectivity from cable modem via USB port on my notebook/desktop is fine. When i try networking with the USB AF-RJ45 adapter I have no connectivity.

Tested 8 of these adapters on a couple machines and they all seem dead. Do these adapters need a specific USB driver when going from USB to RJ45 or are they not intended for networking period? Could be i got a bad batch but 0 out of 8 seems odd.