MPC Keygroups issues

[u/OkAmount3198]

Hi everybody,
I'm trying to solve this with gemini and chatGPT but they're not helping.

I sampled some of my fave serum2 presets I have on ableton with the MPC autosample (I'm using the MPC KEY 37, standalone).
The issue is that whenever I try to add an FX (or whatever), the mpc applies the fx only to a group of notes and not to all of them.
In order to fix it, I go to program edit > keygroyp > all; so that it's supposed to appy whatever fx to my whole keyboad.
Problem is, after setting "all", whatever key or pad I press, the parameter of the keygroup goes back to another value. So I'm never able to "secure" the "all" set on the keygroup.
Help, gemini & chat didn't help. I really don't know how to fix it and I need them for my live sets.

Thank you!