The page isn't redirecting properly - firefox error

Hi all,

I am relatively new to nginx and to configuring my own VPS but until recently I had my site running with no issues at all. Despite searching far and wide I am unable to find a solution to this error. Nginx is displaying default welcome page on my IP address ok but I get the above error when attempting to load my domain name. My domain name was displaying a test page ok until I dowloaded Drupal into the same directory. I have Ubuntu 12.04 on my server and I am connecting to php with fpm via a unix socket, although I am also getting a fail when reloading php-fpm.

Thanks