PollyPrado

Hi everyone, I am new to the Prado world and struggling using the audio system in the Kakadu 2012 I can use the touch screen for tuning the radio etc, however the buttons on the Audio system itself do not do anything. Such as the Power on button, volume, tuning etc. I have been reading the manual and cant find anything that says these wont work. is there a setting somewhere, or do I just have a malfunctioning system? Any help would be much appreciated! Thanks