Question : IIS multiple sites configuration error

IIS7  webserver 2008
I have a default site, our primary domain, and another domain name running correctly on this server.

I have moved a 3rd domain to it, added as a new site.
But requests to it  are being interpreted as going to the default site.

A request to:  http://www.newdomain.com
is getting the default page for  http://www.defaultdomain.com

If I explictly ask for a file in the new domain I get this error response:

Requested URL      http://www.newdomain.com:80/newdomain.asp
Physical Path      C:\inetpub\wwwroot\defaultdomain\newdomain.asp

It's trying to find the new domain page in the default website.
It looks to me that I've configured this exactly like the 2nd additional domain that works correctly.
"Basic settings" show the correct site name application pool  and physical path.
All sites are on  port 80.  The default and 2nd site work fine this way.


Any ideas of what configuration error I'm making?
Thanks

Answer : IIS multiple sites configuration error

Found it right after posting.
It was configured for a redirect.