Hi,
Currently your website is loading 2 different jQuery libraries, and it causes conflict problems upon clicking add to cart button.
Attachment ScreenShot2015-01-30at11.48.27PM.png not found
First, try to change the
jQuery Patch parameter in the FlexibleZoom Effect plugin backend. Try all other settings, one of them might suit your website.
If no luck, then disable the jQuery FIX parameter (choose the 1st option) and look at this topic:
www.flexiblewebdesign.com/forum-virtuemart-2-template-puremart-support/523-the-easiest-way-to-solve-jquery-conflict-issues install the jQueryEasy plugin and choose jQuery1.8 (or jQuery1.7) from the jQueryEasy plugin backend.
Regards.
Support