Nagios problem on FC3

[Uwe Lingner]

OS:  Fedora Core 3
Nagios: 1.2 installed from rpm  nagios-1.2-2.1.fc3 and 
nagios-plugins-1.4-2.1.fc3
apache: httpd-2.0.52-3.1

Hi everyone,
i have installed nagios 1.2 for testing purposes and  there is an error
shown in the web interface which is shown as follows:

Whoops!  Error: Could not read host and service status information!
and on Event-log: Error: Could not open log file 
'/var/log/nagios/nagios.log' for reading!

- nagios -v  has 0 errors and 0 warnings
- no errors in nagios.log    service is up and running

 > id -a nagios    uid=100(nagios) gid=101(nagios) 
groups=101(nagios),501(nagioscmd)
 > id -a apache   uid=48(apache) gid=48(apache) 
groups=48(apache),501(nagioscmd)

chown -R nagios:nagioscmd /var/log/nagios
chmod -R 777 /var/log/nagios
drwxrwxrwx  4 nagios nagioscmd     4096 Apr 26 11:24 nagios

It seems to be an permission problem, but i am not able to find it 
out.........
Any help would be greatly apreciated.
Best regards
Uwe