Escadamagnesim

Hi All good people! I retrofited my halogen headlights from standard to auto So I change control switch All it's coded property and works correctly My problem is when I try dimming my dashboard lights on control switch, knob doesn't respond so in night time it's bit too bright dashboard for me and I can't adjust. any one know whats problem can be ? Maybe miss some coding ? thanks A3 Saloon 2015 UK