Calling custom addto_cart form in commerce_addto_cart_form popup.
I am working on drupal commerce module, I used my own custom add to cart form and it works well. I am using Commerce add to cart confirmation module to show item on a popup. But my requirement is like I want to show a add to cart button on that popup. So I configured the Commerce add to cart confirmation, but here I am not able to call my custom add_to_cart_form in that module. I tried by using other forms it works fine, particular form will appear on popup, but its not working with add_to_cart_form.
So please help me regarding this.