Eggcups icon not appearing

I did a "side-grade" of Fedora Core 2 to CentOS (RHEL) 4.2.

The version of eggcups is "desktop-printing-0.17-3.EL.1".

The DBUS_SESSION_BUS_ADDRESS is being set.

There is a notification area on the panel.  the dbus daemon is running, 
as is hal.

But no icon when the user prints.  I can start eggcups manually and it 
exits without errors, returning a 0.  It does not daemonize.

Any ideas?  I'm more comfortable with web server config than the 
minutiae of all this new fangled desktop stuff. ;-)

Thanks for any help,
Steve Bergman