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

[hackxay]

Hi.
I want to connect hypervisor vbox using command of "virsh connect vbox:///session".
But there is an error occurred:

[root at 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 at 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.
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