Getting a website online

I have uploaded a website that I have which includes a payment page, followed by an online quiz/test for the user to take. All of the HTML pages work although the payment page and quiz/test pages do not load when you are lead to them. I have an SSL certificate on the domain and am looking to provide a web developer with my FTP access to look at the issue. The site can be found at [login to view URL] When at the home page, click on the flashing button at the bottom left of the page which reads "CLICK HERE FOR RECO 2-HOUR TAXATION COURSE" Please provide me with an estimate (a bid) and if you are sure you can fix the problem.