Latest product add to cart button not working

Hello,

I am developing one wordpress e-commerse site,

here’s the site link: http://buddyjunction.com/Electra/

In that home page latest products add to cart not working,where as product page and single product page add cart button working fine.
So can anybody help me out to resolve this issue.

Thanks,

Ravi

http://wordpress.org/extend/plugins/wp-e-commerce/