ROG tremolo, almost no sound

[pietro_moog]

hi guys
i build my ROG tremolo, and it doesn't work as it should.
i checked the circuit an hundred times, but that's the situation:
i heard a very low clean sound, no tremolo.
if i touch the gate of the bs170 (signal pin) the tremolo starts to work in a very beautiful way, but there's big noise.
i think the noise is due by me acting like an antenna.

the circuit is stock as in ROG schematics
any idea?

[Schappy]

Build an audio probe. Probe throught the circuit.

[pietro_moog]

thanks.
i did, i found nothing.

i regulated the voltage on the drain of the bs170 and the pedal started to work correctly.
i think maybe i was just that.