The nameserver's are set up correctly (see
http://www.dnsstuff.com/tools/whois/...aonline.com%2F), so that part of DNS is correct. It seems the problem is at the hostgator end, seemingly the webserver with the content isn't set up correctly: the nameservers are pointing to 67.18.96.45 , but pinging the domain, or direct pinging of that IP receives no answer, suggesting it's a local server problem, or possibly that the hostgator nameservers are pointing to the wrong place.
Update: that folder you linked to with the temporary page is on a completely different server, with IP 174.120.119.60 , so it seems that it is the hostgator nameservers that are pointing to the wrong place.