Can't trigger shutter cammera with "Triger camera now" function

Hello everyone, just made my setup for aerial mapping. I’m using pixhawk (arduplane latest fw) with dragonlink v3, and canon s100 with CHDK fw, and tuffwing shutter cable for canon. Made everything according to instruction on manuals and guides and it won’t work, however with ArduCopter fw it works fine. And yes I’m noticed those warning notification on wiki page that work only on copter fw, and I’d like to be sure will it work DO_Digicam_CONTROL mission command during auto flight. Any thoughts?

Try hit the arming button first