[CentOS] viirt-who Problem or my mistake ?

Hello,

I am new on centos and have installed a KVM Server, now on my host i have on a new start a Error from virt-who and virt-who never starts.

root@bbs init.d]# service virt-who start virt-who starten: Traceback (most recent call last): File "/usr/share/virt-who/virt-who.py", line 33, in <module> from subscriptionmanager import SubscriptionManager, SubscriptionManagerError File "/usr/share/virt-who/subscriptionmanager.py", line 24, in <module> import rhsm.connection as rhsm_connection ImportError: No module named rhsm.connection [FEHLGESCHLAGEN]

Is some missing or have I installed to much ;)