Power to Vesc problem


so i’m doing my first build and i’ve wired up my torque board vesc to antispark swith but when i power on. there’s no power going to the vesc or LED on the antispark switch.

but when i unplug the vesc the LED on anti spark comes on

i measured the voltage output when the switch is on at 3V and input at 20V i have a 6S 5000mah lipo

any help would be greatly appreciated. cheers