Strange Message on Homepage., does not exist.

Hey all,
I am getting the following line when I go to my main domain's home page. It reads.....

You are logged in already. No need to register again!
The site you were looking for,, does not exist.

Obviously the domain is my domain.

This is on the homepage of a new WPMS install. I currently only have the Ultimate Facebook Plugin installed. I am at Lunarpages where there was no other specific wildcard option apart from adding the * sub-domain.

I get the feeling that I have missed a setting somewhere.
Any help would be greatly appreciated. Thanks in advance.