[libvirt-users] how can I use libvirt to connect vbox

Hi. I want to connect hypervisor vbox using command of "virsh connect vbox:///session". But there is an error occurred: [root@vbox ~]# virsh connect vbox:///session error: Failed to connect to the hypervisor error: internal error unable to initialize VirtualBox driver API And my os is Fedora 19. The VirtualBox is 4.3. Some other info is there: [root@vbox ~]# virsh version Compiled against library: libvirt 1.0.5 Using library: libvirt 1.0.5 Using API: QEMU 1.0.5 Running hypervisor: QEMU 1.4.2 Thanks.