Momentary button to send effect with max value

I have a momentary button and I wanna send my send1 to max value (127). I also have a Knob1 that controls the send1. But additionally I want to have a that momentary button. For some reason I can’t manage to send the value of the send1 to max when pressed.

I tried with reaction, but without success (but maybe there is a easier way):

Listener: Button 1o was pressed
Action Block1:
Condition: Button 10 latest velocity value is equal – 127
Action: MIDI Controller – send MIDI velocity value to Controller input Knob1 Value 127
Action Block2:
Condition: Button 10 latest velocity value is not equal – 127
Action: MIDI Controller – send MIDI velocity value to Controller input Knob1 Value 0

Maybe it’s wront to send the velocity value to Knob1, but I couldn’t find an option how to set the send1 directly.

Any ideas on how I can achieve this?
Any help is appreciated