Setting RH Satellite behind a proxy

Hello folks,

I inherited a RHEL 5.7 Satellite server behind a proxy server and I need to update the credentials, I went to this page:

https://SERVERNAME/rhn/admin/config/GeneralConfig.do

I have the following fields:

Admin email address:
Red Hat Satellite Hostname:
HTTP Proxy
HTTP proxy username
HTTP proxy passwd
Confirm HTTP proxy passwd
RPM repo mount point:

Obviously do not intend to modify the hostname and mount point, however the other fields have the previous guy's info.

While trying to configure the HTTP proxy I keep getting an error to specify it via Host:Port number, has anyone encountered that?

How can I verify these values are correct ?

thanks,
enrique.