Not finding my website

I've been using SimpleCMS for sometime now, but one of my websites using won't work. I'm getting a can't find the page message when I login.

contractflooringjournal.co.uk

I have checked the FTP details, which are all correct and made sure the web host has unlocked the IP address for SimpleCMS, but its still not working. However it still works for my other sites.

Any help would be appreciated.