[Fedora-xen] problem with xenguest-install at redhat.com

[Eric Doutreleau]

hi

i m trying to build a new guest on my fc5 enabled machine

the kernel is 2.6.18-1.2257.fc5xen0
xen version is xen-3.0.3-3.fc5

when i run
/usr/sbin/xenguest-install.py

I got

What is the name of your virtual machine? ntp1
 How much RAM should be allocated (in megabytes)? 256
 What would you like to use as the disk (path)? /var/xen/ntp1.img         
 How large would you like the disk to be (in gigabytes)? 10
 What is the install location? http://yum.int-evry.fr/core/fc5

Traceback (most recent call last):
  File "/usr/sbin/xenguest-install.py", line 460, in ?
    main()
  File "/usr/sbin/xenguest-install.py", line 451, in main
    start_paravirt_install(name, ram, disk, mac, uuid, src, options.extra)
  File "/usr/sbin/xenguest-install.py", line 324, in start_paravirt_install
    conn = libvirt.open(None)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 39, in open
    if ret is None:raise libvirtError('virConnectOpen() failed')
libvirt.libvirtError: virConnectOpen() failed

i have read on the list some had the same problems month ago but i 
didn't see any answer on the list.

Thanks in advance for any help