Toggle On/Off

Hi. Sorry I'm new to the MC6.

I use it with my HX Stomp. I've set everything up like in the video to toggle FX on and off with the switches.

So OD on switch 1 with #CC4, Distortion on switch 2 with #CC5, Chorus on switch 3 with #CC6, Delay on switch 4 with #CC7 etc...

The problem is : let's say OD is on and Distortion is off. When I press switch 2 (distortion), it switches the distortion on BUT also switches the overdrive OFF.

Same thing with the other switches. It seems like it disables the last that was used...

What I am doing wrong?

Thank you

Eric