Modifier Problem(?)

Hey guys,
new day, new problem

Trying to map a filter sweep.

Here's what I have so far (everything mapped to a single button)

Effect Selector -> Button -> Direct -> Filter LFO
Button 1 -> Button -> Hold (turns filter on)
Knob 1 -> Button -> Direct -> 0.230 (sets value to 0.230)

Works so far. FX turns on, filter sweeps nicely.

Now I wanna have the ability to change the value via a fader

So I did the following to the same button
Modifier 1 -> Button -> Hold -> 1

and this to a fader
Knob 1 -> Fader -> Direct -> M=1

I press the button, Filter sweeps, Modifier goes up to 1
but the fader does absolutely nothing...

What did I miss?