Can't check out?

[donm1021]

I have the cart setup and I am now testing - I have added a product to my cart in order to purchase and I have chosen all of my options to be included with my order.

I click on "Add to Cart" and I am brought to the screen "What's in My Cart?", and I am shown the product with my chosen options and the price.

I then click on "Checkout" and I am brought to the "Delivery Information" screen to view my shipping address and choose my Shipping Method. I make my choice, and then click on the "Continue" button to proceed to my "payment" method..... Here's where the problem comes in....

Instead of being taken to the screen to choose my payment option, I am taken back to "What's in My Cart" and it becomes an endless cycle.

I never get to the payment option or beyond?

What is causing this to happen?