I shouldn't be actually freaking out it's not like I get comments left and right . Then one of my friends too confirmed that she indeed could not post any comments. Well it was working fine few days back .Suddenly this feature stopped to respond,it seems to have a mind of its own .
So I googled to find out that the below options should be set for the comments to be posted properly.
The usual fix
But hey everything is as said above then what's wrong ????
So I found a workaround after breaking my head to fix the comments .
Well this is the workaround
Select the option "Pop-up Window " instead of "Embedded below post".
So now this is how the post comment option looks when either of them are selected
Pop up Window
Will display a hyperlink which will navigate to another page where you can post comments
Embedded below post