Yum, rhn and an apache proxy : problems

Hi,

I have some truble  to  use yum through  an apache 1.3 proxy.

-- When I try to update my system :
yum update
Loading "installonlyn" plugin
Loading "rhnplugin" plugin
Setting up Update Process
Setting up repositories
Error: Cannot open/read repomd.xml file for repository: rhel-i386-server-5


-- In the log file /var/log/up2date, all seems to go well :
[Thu Nov 29 11:03:24 2007] up2date logging into up2date server
[Thu Nov 29 11:03:25 2007] up2date successfully retrieved authentication token 
from up2date server


-- In the apache 1.3 proxy log files, seems to go wrong :
"CONNECT xmlrpc.rhn.redhat.com:443 HTTP/1.1" 200 -
"CONNECT xmlrpc.rhn.redhat.com:443 HTTP/1.1" 200 -
CONNECT xmlrpc.rhn.redhat.com:443 HTTP/1.1" 400 307

So I've got two good response (for the authentification I suppose) and one bad 

I've tried to modify python in order to add a userAgent ... but doesn't change 
anything.

I've tried to use local variable (http_proxy and https_proxy) in place of the 
configuration in yum ... but didn't change anything ...


In the other hand, all rhn_* commands work greats ... rhn_check works without 
problems and the information is up to date in rhn.redhat.com ...



Any idea ? 
thank you in avance.




Well 



-- 
Guguin Benoit
Société Alixen 20 rue Jean Rostand 91 400 Orsay Cedex France
Tel :  01 60 19 72 31, Fax : 01 69 41 78 54