Description of problem:
We bought ReadHat ES4 et I installed it yesterday evening.
It is impossible to update my server and I obtain this error message in a window :

Error Message:
    Please run rhn_register (or up2date --register on Red Hat Enterprise Linux 3
or later)
as root on this client
Error Class Code: 9
Error Class Info: Invalid System Credentials.
Explanation: 
     An error has occurred while processing your request. If this problem
     persists please enter a bug report at bugzilla.redhat.com.
     If you choose to submit the bug report, please be sure to include
     details of what you were trying to do when this error occurred and
     details on how to reproduce this problem.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
When I connect to rhn.redhat.com, after login and Pwd, I obtain a screnn with my
server store2_archaeon listed, with a watch on the left end of the line with all
the packages scheduled, but I can't obtain an update of these packages.
How can I do ?

Best regards

Jean-Yves LEFEVRE (From Paris)