XDJ-XZ automatic light switch is not working with RB-DMX1

Hi All, it says *Please note that rekordbox 6.5.1 introduced automatic deck switching for the lighting for the following models: XDJ-XZ, DJM-V10 (non-LF model), DJM-TOUR1, DJM-900NXS2, DJM-750MK2.

I am using XDJ-XZ with RB-DMX1 in performance mode but auto switch is not working. When I click Auto it is always stays and follow Deck 1. I tried volume faders and deck fader moving up and down and left to right, nothing works. I am using an external mode in rekordbox and deck fader assigned to deck 1 and 2. What am I doing wrong? I am running Rekordbox 6.8.5. Thank you.