Proxy not working on particular site

I'm having trouble with the proxy working on a site. It works fine for any other standard site. It worked a few days ago but know it won't scrape. I've tried different ports and different browsers. In addition I tried to build it manually but can't get passed the login. I've tried what the tutorial stated on logins but to no avail.

Can you help?

The site is www.collegcoachesonline.com

Thanks