Re-install using http://www.howtoforge.com/perfect-server-ubuntu-9.10-karmic-koala-is

Am getting stuck on ISPConfig2, well at a loss really:

when I enter the details for hostname (eg:www) and domain (eg:zyx.de), it comes up with error:

The URL is not reachable!

Have entered the hostname of my server which is listed in /etc/hostname

Any ideas, I know its gonna be something simple....ARGH!

Typical, I experimented a bit and solved it, sorry guys. No need to post replies.