I've got Google Checkout installed and it is showing up as a payment method on checkout. When selected as a payment method you can go through to confirm the order but after clicking on 'Confirm' it loops you back to the shopping cart and never brings up Google. It is also not completing anything through Zen Cart, the item remains in the cart. I am not seeing any errors.

Also, is there supposed to be a logo or something. It just shows 'Google Checkout' in text. If there is supposed to be a logo, the fact that it's not there may help sort out what's wrong?

I'm sure I've got something configured incorrectly, I'm just not sure what. Does anyone have any ideas?

Thanks.