Can't add products to the cart / Tried www. and SEF and doesn't works /

[Ignus]

Hello, I have a lot of problems with my site in joomla with virtuemart, but primarly because I can't add products to the cart. I've tried everything I've found in this forum and nothing seems to work.

This is my site:
http://www.superventascolombia.com/

I have close to none modules that can conflict with each other, so I don't know what to do.

Before i disabled the ajax confirmation popup, but now I can't remember how to get it back, so maybe that could make it work again.

Thanks for your help.

[GJC Web Design]

You are using the Rupostal one page check out - it is commercial software - they are the people you have to ask...