virt-manager and KVM

someone has used with success the virt-manager with KVM guests on openSUSE 11?
I’m able to run KVM guest from the console, but not with virt-manager.
On the virt-manager web site, they write that we can use virt-manager not only for Xen, but also for KVM and QEMU guest.
Thanks a lot

Massimo Montecchi