Here is the info in nagios.cfg:
use_retained_program_state=0 (I just changed this to 1 today)
This is the nagios included with the Novell's SLES/OES 9 Distribution.
Here are some things from the log file:
Error: Could not create external command file
'/var/spool/nagios/nagios.cmd' as named pipe: (17) -> File exists. If this file already exists and you are sure that another copy of nagios is not running, you should delete this file.
 Bailing out due to errors encountered while trying to open the external command file for reading... (PID=17854).
(These messages repeated four times)
So I stopped nagios. Looked in the /var/spool/nagios/ directory and saw that nagios.cmd had a timestamp of Jul 2nd. Deleted that file, and started nagios up again.
It's reporting that the server is in the 'Ok' state now.
Thanks for the help,