How to add an Lfo modulator to an hardcoded Faust FX?

[Sounddiy]

Hi!

I would like to modulate a parameter from an hardcoded faust FX.

• I compiled Hise both "visual studio" and "release with faust" with :
  NUM_HARDCODED_FX_MODS=12
  NUM_HARDCODED_POLY_FX_MODS=12

• I check and I have 12 extra slot :

• I add a extra slot to parent script FX and Change external modulation to combined.
• I compile dsp network and reload Hardcoded network dll but it seems to not work.
  I Do not understand really how to make it work ord perhaps that Faust Fx cannot be modulate...

Thanks !