I just took a peek at ISPConfig Documentation located at:
http://ispconfig.org/documentation.htm
In this page you will notice that the suggested HowTo is:
http://howtoforge.com/perfect_server_fedora7
The HowTo you used already?
It would appear that you may want to look over the HowTo and see what you missed, there's not allot to do when installing ISPConfig, Falko provided a link at the end of the HowTo dealing with installing ISPConfig:
http://www.ispconfig.org/manual_installation.htm
Thank you
Regards