Shift knob

Hi

Is it possible to map a shift knob in CCS to use faders/knobs/buttons multiple times but in ableton? For example I would like to use fader 1 for track 1 to change the volume this I already did in CSS script. Now I want to be able to press the shift knob which I generated in ccs I would like to map a parameter in Ableton internally. But I get always same midi channel and midi number :/

Example:
Is it possible to say
fader 1: midi channel 1 – cc 20

When shift is pressed then:
fader 1 send: channel 2 – cc20

I tried this with reactions but until now it don’t worked. 🙁 .

Thanks for answers.