AEM 5.6 - Responsive Web Design Device Preview option

Hi,

we have developed responsive web design website in AEM 5.6 and wanted to enable to preview option for various device in the side kick as like Geometrixx Media website and have followed the steps in the below URL for enabling the preview option for various devices using Side Kick and i am able to see the Device and Rotate button but if click device arrow to see list of devices then is displaying empty. Added the necessary configuration mentioned in the below link. 

http://dev.day.com/docs/en/cq/current/developing/mobile/responsive.html#Previewing%20for%2 0Specific%20Devices

Any help/guess please

-Sudharsan S