Error when trying to specify RDS login

Hi,

I'm trying to learn Coldfusion. I am working through a book "Macromedia Cold
Fusion MX Development with Dreamweaver".

After I set up a site, and make a coldfusion page, I attempt to add a database
and bindings. I get the check list (1-6). One, two and three are checked off,
but when I try to check #4 (Specify the RDS login for your coldfustion server)
I get an error telling me "The server name or address could not be resolved".

I have coldfusion installed. When I click on Test URL it passes (The URL
Prefix Test was Successful). The first time I did all this it worked fine. I
had a different problem (unrelated). Once that was resolved, I tried to start
over, and this is where I am stuck.

Any ideas??

Thanks!!

Chris Rice
crice (AT) pack210 (DOT) com