Zoom is not working

i install this plugin, but its not working.
my product page link is: http://www.letsexpresso.com/product/autumn-hued-infinity-loop-scarf/

product image is loading. when i take mouse hover on product image, its shows me product image link. but not showing any zoom.
i try every thing, but can’t find any solutions.

Thanks

http://wordpress.org/plugins/yith-woocommerce-zoom-magnifier/