Not able to inherit page properties from parent page

Problem:

I have created a live copy from Geometrixx site. I have pointed cq:template and sling:resourceType of parent page to my custom template and page component. I have created a new child page, when I checked the page properties of child page I don't see inheritance (lock symbol) on my child page properties dialog.

-Sample/

     -en/

          -childpage/

Solution:

I am able to see the lock symbol on child page properties dialog after adding the mixin "cq:LiveRelationship".