The requested URL could not be retrieved

While trying to retrieve the URL:

The following error was encountered:

Unable to determine IP address from host name for
The dnsserver returned:

Name Error: The domain name does not exist.
This means that:

The cache was not able to resolve the hostname presented in the URL.
Check if the address is correct.

I don’t know what happened but somehow my whole site vanished into thin air last night… i swear i didn’t muddle with anything to cause this to happen but it did… anybody knows what’s wrong… is dreamhost’s server down or something ? cos when i log in… my subdomain was registered but everything inside it is missing… sigh