No logging to /var/log/messages or /var/log/secure

[redhatdude@xxxxxxxxxxxxx]

Hi,
After a few days of not checking the logs, I did today and to my  
surprise messages and secure are not getting anything.
I've updated my FC5 many times and I can't really tell when this  
started to happen. I check other logs like /var/log/audit/audit.log  
and it works, but secure and messages don't.
Why is this happening and how can I fix it?
EJ