I seem to have an issue with the add to cart button on my site.

When the 'add this to my cart' button is clicked it relocates the user to a blank page. The item does end up in the shopping cart if you hit the back button. But I'm not sure why the blank page.
Any help would be greatly appreciated.

This is my first time configuring the site, so I'm hoping it is just a configuration setting I have not gotten to yet.


The web address is
http://www.surveillancepackages.com