Magento

I moved my magento install over to a new server and everything works fine apart from the shopping cart.

When I click on the Proceed to checkout button the contents of the cart are lost and I get the no items in your cart text.

Using latest version of Magento.
Anybody point me in the right direction of what might be causing this error.

Fixed - was a server security issue

If you don’t mind me asking, how did you fix this? I’m having the same problem only sometimes with IE users. Their cart contents disappear. I’ve never seen it and have tested on many different browsers, but customers have emailed complaining about it. HELP!

http://www.btiffny.com