XDJ Aero platter LEDs not illuminating ...

 Hello friends:

I recently purchased a XDJ Aero and set it up. For the moment, I use it as a controller to control Rekordbox DJ (Pro) on Windows 10. I notice that when I load a track onto either deck, the deck's platter LEDs do not turn on. This is true whether or not I start the track on that deck.

Might anyone know why? Do they not illuminate when used as a controller to control PC software (e.g. Rekordbox DJ and/or Traktor)?

Under what conditions / usage do they illuminate?

Thank you in advance, =:)

NYCeyes