Unhandled Exception, plz help

[needee]

OS: SLED 10
when I login, I got the following error message

Unhandled Exception
System.NullReferenceException: Object reference not set to an instance
of an object
in <0x003d6> Novell.Zenworks.Gui.ZenTrayIcon:CheckUpdatesLoop ()
in (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

why ? and how to remove the above error

Regards
Needee

[devils casper]

problem is in database of ZenUpdater. log in as root and execute this

su 
killall zen-updater
/etc/init.d/novell-zmd stop
rm -f /var/lib/zmd/zmd.db
/etc/init.d/novell-zmd start
zen-updater &

[needee]

thanks Dear devils_casper .. for such a nice and quick help
by the way ... whats the reason for the problem in database of ZenUpdater ? why and how zmd.db automatically become corrupted ? Some times it seems that, Novell is so near to M$, or works/behave like M$

Anywayz Thanks for help
Regards
Needee