It's probably the same issue we saw with this theme before, i.e:
there seem to be a conflict with a duplicate copy of jQuery that your Virtuemart theme already includes in the minified template.min.js.php. We also supply a copy of jQuery for Joomla 2.5.x as this version of Joomla doesn't include one by default like 3.x does.
So looks like we should be able to help with this but would need temp Joomla login to be able to change the template files. If this makes sense, please email the details to support at webrotate360 dot com.