root python /usr/share/rhn/virtualization/poller.py errors in cron

[cron.d]# cat rhn-virtualization.cron
0-59/2 * * * * root python /usr/share/rhn/virtualization/poller.py

 

Message 1:
From root@  Fri Jun 22 11:40:01 2012
Date: Fri, 22 Jun 2012 11:40:01 -0400
From: root (Cron Daemon)
To: root
Subject: Cron <root> python /usr/share/rhn/virtualization/poller.py
Content-Type: text/plain; charset=UTF-8
Auto-Submitted: auto-generated
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
X-Cron-Env: <USER=root>

libvir: error : no connection driver available

rpm -qa | grep libvirt
rpm -e rhn-virtualization-host