I have big problems with my payment methods on my website. When I adda to cart one product and proceed to checkout, on the second step where i need to(as a guest) fill the fields with informations name , adress etc., when I click on the continue button and magento does some loading but finishes and stays on the page. I cant complete a simple shopping! any ideas? i'm using a downloaded theme, but I dont think tahat is the reason.