Murr, this happens a lot. All you need to do is change browser. If that doesn't work out for you then try refreshing the page. If all fails again and that doesn't work try using the Proxy settings by going to your start button and type in the search bar 'Proxy' and it will come up with a Proxy server. Double click that and run the program. I'm sure you'll be able to take it from there.
Still not working for you? Try PMing a member of staff.