Just wondering if there's some kinda fuse you can check,is there any noise from your engine when you try to press the control ? make sure theres no rubber mats etc beside the foot brake might be stopping brake from going right up which will confuse the system as cruise control system works along with the braking system maybe ???,I had Honda with this great when it works ,might even be some kinda relay /sensor fused, lets us know more if you can
Wilson