sitw will not let you process a order

add product to cart, go to process cart order and site goes to www.thebobbybrantley.com/index.php?optio...rl=checkout&Itemid=2

can anyone help me with the issues that i have with the program?

I'm actually not able to reproduce the problem because when I log out from your website, I can't access your product pages.
When I'm logged in, it works properly but of course I don't get the registration screen since I'm already logged in.