You don't have permission to access /nagios/ on this server

I am getting frustrated an not getting anywhere when I try to install and config Nagios 3 on Fedora 11. I have followed all the information on the web and still getting this message.

You don’t have permission to access /nagios/ on this server.

I think it is a apache security issue. Can someone please help before I give up ?

are you following the installation instructions on the nagios website or something different?

Perhaps this Fedora 11-specific quickstart guide can help? 8)