change fonts not visible on other browsers/laptops

I changed fonts :

header: font-family: 'Calligraffitti', cursive;
body: font-family: 'Abel', sans-serif;

But a client tells me he can't see the fonts I changed on other browsers/laptops/tablets?

As far as I can see I pasted the google fonts in the right way (see attachment)
:
http://fonts.googleapis.com/css?family=Abel
same for Calligraffitti

Did I forget anything - may be to add fonts to gk-stuff.css ?
Any advise ?

Could you please post an url to your site?