Uhm, was first like that your site has a problem, for unknown reason...
but then i looked into Whois:
Name Server: NS51.1AND1.COM
Name Server: NS52.1AND1.COM
Nope, ain't artichost nameservers. Would help a lot if you'd transfer nameserver to be ns1.artichost.net and ns2.artichost.net
There's been some issues with Apache last night, should be resolved now (as you can see, you are here, on tinyportal