[libvirt-users] libvirtError: internal error cannot find PCI address for balloon virtio

Hi guys, I have a little problem here. When I want to install a virtual machine I get this error: libvirtError: internal error cannot find PCI address for balloon virtio Libvirt is running on a debian 5 system with kvm and of course libvirt. How can I solve this problem, I searched on the Internet but there aren't posts about this problem yet. So I don't have an idea where to look for. I hope you guys can help me. With kind regards, Wouter.