@ChristianBloch are right, i 've checked the schem and without Gate signal it is normal that it does not work, because in the diagram without Gate In of an APC pin 4 of the 555 from the top should go to +.
so it is the gate signal that sends current and operates the beast.
if you add a switch you could have both possibilities.
and for the CVin, for me it should go to pin 7 of the 555 of the top
EDIT :
CV pin 7 like this schem with baby 8:
or here
