Cruise control doesn't work

I drove to Chicago today (about 150 miles). The cruise control worked fine on my way there. But on the way home -- nothing. It won't work at all. The car is about a year old and has 13,500 miles and is covered under warranty. I made an appointment to have to serviced next week, but was wondering if anyone has had problems with cruise control, or if this is a fluke.

 

Hmmm... I never use B mode, but it's entirely possible I might inadvertently shifted to it (I was driving with exotic birds in the car, so keeping an eye on the birds is a bit distracting to say the least).

Thanks, I'll be more aware of this next time.

Karen