GM36 turn off chorus?

I was wondering...when i use the red box direct to PA or play through my interface it sounds like theres chorus on all the time. I've tried pressing the fx acess button and turn the volume/modulation button all the way down and then hitting the fx button again but it's still there?

Does anyone know how to get rid of modulation? Is it just when using the direct out or am i doing something wrong?
I just bought the amp so i am new to this

The knob that governs the effect level is the Gain knob. The volume knob determines which modulation effect you`re turning on. Hit the effects access button, turn the gain knob all the way down. Exit effects access, press and hold the Save button until it blinks, let go. Done.

Thanks man!