CarreraCup03

I have a 2005 CTT. The cruise control has never worked since I have owned the car (5 years). The green light goes on when I engage cruise control ... but none of the functions of the cruise control work. Any thoughts? I have read about a brake control switch over the brake pedal going bad, but I do not have the switch, and everything else works perfectly.

Is there a fuse that can be blown. I do not see a fuse listed in the manual.