yum update on RH 9

[Barry Gamblin <bgamblin hao ucar edu>]

I'm trying to setup "yum update" on RH 9 using the directions on 
http://fedoralegacy.org/docs/yum-rh9.php

AFAI can tell I have imported the correct keys but I still get 
an error "Could not find the GPG key necessary to validate package 
/var/cache/yum/fedora-stable/packages/perl-DateManip-5.42.0.fdr.2.a.rh9.
noarch.rpm"

I've run yum clean like it tells me to do, but I continue to get 
the error.

Ideas?

Thanks, Barry