auto avs preset changes

My AVS used to change presets automatically after so many seconds. What happened? Was this discontinued in newer versions? Or is there something I need to change or add?

Start AVS, double click to get to the editor. Then go to the settings menu and select 'Presets/Hotkeys'.
At the bottom is a checkbox which says 'Randomly switch presets'. Make sure it is selected (checked).

thanks alot, matt.

just press "R" key and random play will be turned ON or OFF