[Plugin: WP e-Commerce] Ajax(add to cart) problem only in IE

This is a problem only in IE(tested in IE8 and IE9), in FF and Chrome works fine.
When you are trying to add a product to the basket then it gives an error to the line eval(returned_data); and the loading wheel it keeps spinning.

I assumed that the problem was the eval() and i tried something like that:

function loadMyFuncModule() {
var dj_global = this; // global scope reference
if (window.execScript) {
window.execScript(returned_data); // eval in global scope for IE
return null; // execScript doesn’t return anything
}
return dj_global.eval ? dj_global.eval(returned_data) : eval(returned_data);
}
loadMyFuncModule();

But nothing changed…, does anyone have any idea about whats wrong with explorer?
The site is https://scs.tv/our-products/
Thanks!

https://www.ads-software.com/extend/plugins/wp-e-commerce/