Apache configuration

Hi all,

I'm trying to use InstantRails to host a Rails app which can be
accessed from the internet. I'm very new to this, and can't seem to
get Apache to play along. I've set the ServerName to my static IP and
set the Listen option to the same, but can't seem to access anything
externally. I'm running this under Windows, and have all relevant
firewalls switched off. Can anyone help?

Many thanks,
Adam