up2date not working after update3->4 move

[Mike Zupan]

So we have a server that pulls in all the updates from RHN onto one server
and makes a  yum repo off them. Now when I updates a RHEL es update 3 to
update 4 I get this now

[root at rh43repo-cab4 rhn]# up2date -d --installall --channel=rhel-i386-es-4
No such allowed channel:  --channel=rhel-i386-es-4
[root at rh43repo-cab4 rhn]# up2date --show-channels
rhel-i386-es-4
rhel-i386-es-4-extras
rhel-4-es-i386-rhaps-2

rhn_register says I'm still registered.. is there anything I did wrong when
I moved to update 4?

Thanks
mike