When you add something to your cart and proceed to checkout on my site, you get a message that the page contains secure and unsecure items. Can someone take a look at my site, add something to their cart, and proceed to the checkout page and let me know if you can see what is causing this? I'm also noticing that the checkout page isn't showing the "SSL lock" at the address bar.

The website is here. Thanks for any help.

Edit: You only get the message in IE, not FireFox.