Hi guys a newbie here

This is my first avic and seem to be having problems with power off from withing the menu

I previously had an AVH and you could click on the little arrow on the screen and in the drop down menu touch the off and it would turn off, but when I do this on my avic-f970bt I here the beep but it doesn't turn off and goes back to the previous screen 

 

Any help is appreciated

Thanks