Nagios web interface is not getting

Hello everyone,

I had installed nagios 3 on fedora 5 successfully and i have verified sample config file by issueing command like
/usr/local/..... -v /usr/local.../nagios.cfg .
....and i am getting the result as well. After that i started nagios by giving command like ... service nagios start
But i am not getting the web interface.The UNIX and Linux Forums - Learn UNIX and Linux from Experts is showing page not found error ,and i checked the httpd.conf file several times and i am not able to find out any problem in that.

Please help me to solve this problem.........

Thank in advance

Does apache's error log show anything?