Scheduled package update from RHN is stuck in queue

I just registered my system using rhn_register. After I was able to do that successfully, I created a package of all the updates in the RHN customer portal, and scheduled it for installation. That was last night, but it's still listed as "in progress". The earliest it is scheduled for install is "5/5/11 7:25:29 PM PDT", which was last night.

Obviously I'm missing something, but I can't figure out what.  How can I get this update triggered and pushed to my system?