There is a very small chance that analogRead() returns HIGH. analogRead() returns a value between 0 and 1023 (both included). HIGH is defined as 1; so only if analogRead() returns 1, you will set the PWM output to 120.
I do not understand what you try to achieve with a capacitor? I also do not quite understand 'toggler with resistance'.
Maybe you can draw a little schematic for both scenarios (photo/scan of hand-drawn one will do).