index.php?main_page=checkout_shipping_address not loading?

Hi,

We have not long transfered our website to zencart, and we have had half the amount of orders we used to get.

The products we sell are baby hampers which most people want delivered direct to the intended person.

We realised that the index.php?main_page=checkout_shipping_address page has not been loading correctly, and only shows the header. (on the change delivery address page during checkout)

http://purenappycakes.com

Does anyone know why this could be?

Check this first:

https://www.zen-cart.com/tutorials/index.php?article=82

Thanks, i had a look, and sort of found where the error may be coming from. I renamed the file called "header_php.php" in includes>modules>pages>checkout_shipping_address and added .bkp to the end of it, and the shipping page now displays, but not 100% correctly,