right guys cd70navi 08 plate elite ....the problem is the radio controlls wont work on either the head unit or the steering wheel controlls .
the buttons appear to work fine when iv got a cd in can skip to next track repeat fast forward etc but when the radio is selected the only button that will work is the volume can't even go from fm to am ...

now it was ok earlier and whilst waiting for the mrs to finish her work i was pressing buttons and playing about with the head unit i have obviously done something but don't know what

anyone any ideas please