According to the WHOIS, on 20 October, Dave moved the domain name from directNIC to GoDaddy. The problem is, his nameservers still reflect directNIC's servers
(ns0 and ns1.directnic.com)
The problem with that is that directNIC cannot offer hosting or other services to domains which aren't registered with us, hence Dave will need to log into his GoDaddy account and change the DNS servers to reflect a new Web host. This is why the "site is not found on our server".
Wayne
(who coincidentally happens to work for directNIC)