Cruise control not working, 2.5 automatic

[98cirrus]

My Cruize control hasn't worked since 60,000 miles. Car now has 94,000 miles on it. Actually, the cruize would work sometimes but not others. Now not at all. If I turn the cruize control on, it simply automatically turns itself off shortly after, regardless if I try to set a speed or not.
There is plenty of vacumm to the servo unit. I am wondering if the output speed sensor needs to be replaced or cleaned. However, speedometer, shifting, odometer and such function perfectly & always have.
Any ideas on what the problem may be?

[thestaton]

Can anyone recommend on how to fix this? Mine will turn on, and then after like a minute just turn its self back off - never working.

any help?