Can't activate "Case light" (nozzle LED)

[hzzm028]

I tried M42 P6 S255 which worked on the stock CR6 Motherboard, then I tried M355 P255 S1, also M42 P4, P5 etc.
Nothing switches on the nozzle LED, which is blinking when flashing the firmware.

I'm using firmware(CR6 Original Touch Screen).
Is it an advantage for me, to compile from BTT-SKR-CR6 instead?
I see the changes are more recent.

Using the BTT V1.0 CR6 Motherboard, of course. Printer works fine otherwise (I don't have any of the displays; OctoPrint + OctoDash).

Thanks for any hints.

[hzzm028]

Problem solved by using CF-6.1-FINAL from
https://github.com/CR6Community/Marlin/releases

I didn't realize it natively supports the BTT-SKR-CR6 board.
In there it is M355 S1 btw.