Current Order Form Buggy. Paypal integrated already but need preview feature.

Right now i have an order form. it was working perfectly until two days ago when a customer contacted me stating the they could not place their order because of a redirect loop issue. The order form is integrated with paypal. What i need is a person who is an expert in paypal development/api. Also they need to be able to help me customize the order form. What i will need is for the programmer to help me fix this redirect issue. Also attached is how my order form looks on the confirmation page. before the confirmation page you are able to enter your details. please take a look at my site [login to view URL] and go through the ordering process.... when user enters their website details , on right hand side i want a preview box of how their text ad will look like on the directories their site will be added to. Kind of like adwords. when you create your ad, adwords has a preview box of how your ad will look like on sponsor listings. right now its setup when user enters their details, they are taken to a confirmation page and then redirect to paypal but the loop issue doesn't redirect user to paypal. I need this done in 2 days. please no companies. I want to work with freelancers directly and be able to communicate with they 24/7 even on weekends.