need help with cruise control

OK, here's the deal..

I was driving one morning and the cruise just wouldn't set. I have since tried the steering wheel switches, jumped the harness at the clutch switch and brakelight switch, and now I am at my wits end. I want to have this fixed before I try to drive 7 hours of interstate to the Nashville 40th ann. Show in April. Any ideas, comments, or suggestions would be most appreciated