LOG alert not showing yellow

I have a small problem. I've set up monitoring of the /var/log/messages
logfile to search for the string "authentication failure" and alert with a
yellow button in the MSG column. I can see the error displayed when I click
on the button below the Msg column header but it does not turn yellow.

 
 Below is the entry in the clients-local.cfg file:

 
[batman]

log:/var/log/messages:10240

ignore MARK

 
This is the entry in the hobbit-clients.cfg file:

 
HOST=batman

        LOG     /var/log/messages       authentication failure  color=yellow

 
Why doesn't this give me a yellow alert.

 
 Thanks

 
Robert Manocchia

UNIX System Administrator

IDEXX Laboratories

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EMail user-615a9b935f98@xymon.invalid