Pop over does not work at all - nothing pops up ever

Hi Support,

This domain http://john-broome.co.uk works fine

this domain http://livingnaturallyayurveda.co.uk

The login details for the site where it does not work are:-
[removed for security]

I have used pop over for over 4 months full time on another domain, and see no difference here except the theme and some plugins.