Not able to inherit page properties from the parent page

Problem:
I have created a live copy from the 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 the 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".