Cruise control and speed limiter.

Hi all, im just after a bit of advice. Ive recently bought myself a 197 and I cant get the cruise control or speed limiter to work. I press the button on the dash and it comes on the clocks saying its been activated but I cant set a speed. The only thing it does on the clocks is it says cruise control activated with three dashes. Any advice would be great. Thanks
 
Should be;
Flick the Cruise control button on
Dash will change to "Cruise Control --"
Then get up to speed and press the + button on the steering wheel - this will set your current speed and cruise control will take over
You can then use + and - buttons to increase or decrease your speed
If you have to clutch or brake, cruise will cut off and you can then recall your previous speed with the R button on the right hand side of the steering wheel.


ETA: I think you also have to be going 30mph+ to use cruise control too (seem to remember reading this somewhere)