[Need Help]Problem about options "ADD TO CART"

[BaNiK]

Hello bro,
I am the admin of website http://www.dongtrunglinhchi.com/ - about herbs . It is a wordpress website. And i have a problem with "ADD TO CART" option and i need your advance to fix it.
I tryed hard to fix it but i could not.
I don't know how to talk about this problem to you see. Please visit my website at http://www.dongtrunglinhchi.com/nhan-sam-tuoi-han-quoc/ , check "ADD TO CART" options and then help me fixing it.
Please show me here- at this topic. I am waiting for your help here.
Many thanks to you!

[ronalds]

What I think you should do, is, contact developer of the theme http://www.elegantthemes.com/contact.html and I'm sure they will help you sort this out. Because now there's no telling what's exactly causing the problem, if it's incorrect setup or bug in theme itself.

[xman0811]

Thank ronalds very much,
I used this theme without any editing code. I will contact them.