UE5 Switch Parameter in Material Layer Blend not working

Hello :slight_smile:
I’ve been creating a terrain using material layers. I’m trying to create a material layer blend with slope and height controls. I created a switch parameter to turn on and off the masks, but for some reason, in the material instance turning on and off the parameter makes no difference, everything stays the same as the default. I get the feeling that I’m doing something wrong that is pretty obvious and dumb lol

Does anyone have some idea what’s wrong? THanks for the help!