Sending Play- Record - Sustain message to Akai APC40 / Backlights

Hello, all the question is there: i m using play/ stop , record and sustain buttons on the APC 40, and i would like to lite the backlight Dels. Sending notes of the incoming midi signal given by those buttons doesnt work.
Thank you

I’ve been doing this with an apc20 some years ago.
I’ll try to find back a piece of patch and post it.
I think I was using todo for this.

Thank you Mehdi