Hi Folks, I'm getting the following error while tying to install apache in my SLES 11.3. Please advise

root@txadfwqdc001:~# zypper install apache2
Refreshing service 'spacewalk'.
Problem retrieving the repository index file for service 'spacewalk':
[|] Error communicating with server. The message was:

Error Message:
Please run rhn_register as root on this client
Error Class Code: 9
Error Class Info: Invalid System Credentials.
An error has occurred while processing your request. If this problem
persists please enter a bug report at bugzilla.novell.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.

Skipping service 'spacewalk' because of the above error.
Retrieving repository 'spacewalk-tools' metadata [\]
Download (curl) error for 'http://download.opensuse.org/repositories/systemsmanagement:/spacewalk:/2.2/openSUSE_11.3/repodata/repomd.xml':
Error code: Connection failed
Error message: Couldn't resolve host 'download.opensuse.org'

Abort, retry, ignore? [a/r/i/?] (a):