Micro soft xls 2013 insert, cut, paste option grayed out !!!!

I have checked almost all the Google search links to find how to solve this. All were giving same solution of changing the option to have "Show Insert Option buttons". But even with this change my stupid xls was behaving same way.

Finally the below lines of the link http://www.askeygeek.com/reasonscauses-for-why-insert-button-is-greyed-out-on-the-developer-tab/ solved the problem.

A million thanks to Mahesh !!