Installing Site Builder

[omegauser]

Hi, I have just installed Sitebuilder from the updater option>

But when I access it thru modules, It says>
Cannot access SiteBuilder2 at 'http://sitebuilder.NS1.DOMAIN.COM/remote_admin/': Couldn't resolve host 'sitebuilder.NS1.DOMAIN.COM'. Incorrect responce from sitebuilder Incorrect responce from sitebuilder

And the autoinstaller says>
Registering DNS record for sitebuilder.NS1.DOMAIN.COM with ip 66.235.209.73
Unable add record in DNS server: domain NS1.DOMAINCOM not exist
===> Error. You must add record manually
Installation done.

What did I do wrong???????

 

[omegauser]

I think my Hostname is weird, It is ns1.mydomain.com

What hostnames do you use?