Checkout Page takes FOREVER to Load!

I am running CS-Cart 2.1.4 on a dedicated server.

If you register as a customer, then login and place items in your cart, then press the CHECKOUT link, the page takes 8-15 seconds to load.

We have tweaked several server side settings and have sped up the site itself, but the checkout page is still ungodly slow to load.

The site is

Let me know if you have any suggestions. Thanks!

runs fine for me

Ok here too, chrome and FF