WiFi adapter no power

I bought the DWA-125 recently and am trying to get it to connect to the WD TV. Turns out it’s the A3 version and not the A1 or A2 that are listed in the compatibility list. Has anyone successfully used this version with the WDTVLive? The problem I’m seeing is that the adapter won’t even power on when connected to the USB port. Both the USB port and the adapter are working (confirmed using different hardware).

If its not on the list then that’s the reason for your problem, but just to be sure you can also try to use the WIFI adapter on you computer.