Nothing loading after "checkoutSuccessMainContent" on thank you page?!

Hey all, we are having a big issue... when a user buys one of our products at https://www.baselinesoftware.com, on the thank you page with their order number the source code ends here

<h1 id="checkoutSuccessHeading">Thank You! We Appreciate your Business!</h1> <div id="checkoutSuccessOrderNumber"><strong>Your Order Number is:</strong> 10603</div> <div id="checkoutSuccessMainContent" class="content">

There is nothing after that. It seems like define_checkout_success.php isn't even loading... which is a big problem because theres loads of code on there we need. Does anyone know why this could be?

Ahhh, figured out the problem. If you have the print invoice script applied on your checkout page, it doesn't allow the rest of the page to load, so get rid of that, and your golden!