ISPConfig stuck with error: The URL is not reachable!

[adobe]

Hello,

I am trying to install ISPConfig Control Panel onto my Debian 4.0 Etch server, so I followed this guide first in preparing my server for ISPConfig -> http://www.howtoforge.com/perfect_setup_debian_etch

Once that was complete, I was following this guide here http://www.ispconfig.org/manual_installation.htm and im at the stage where it asks me this question:

All prerequisites are fulfilled.
Here we go...
Please enter your MySQL server:localhost
OK
Please enter your MySQL user:root
Please enter your MySQL password:
OK
Please enter a name for the ISPConfig database (e.g. db_ispconfig):db_ispconfig
Please enter the IP address of the ISPConfig web (e.g. 192.168.0.1):xxx.xxx.xxx.xxx
OK
Please enter the host name (e.g. www):www
Please enter the domain (e.g. xyz.de):mydomain.com
The URL is not reachable!

Since, I am trying to setup my server to run on "mydomain.com", i gave those url, it errors like so:

The URL is not reachable!

The ./setup script is confusing, why would it ask for a domain name to run the ispconfig, if it's the first time i am actually running the ispconfig so i can create the nameserver for the "mydomain.com" and have it point to server.