[libvirt] Problems with live migration

Hi all, I have working with Openstack Folsom and with Glusterfs as shared storage for /instances. All working fine, but when i'm trying to use "nova live-migration": 2013-03-07 18:33:42 3140 ERROR nova.virt.libvirt.driver [-] [instance: 773164b5-5e5c-4328-a762-d91f50f2ac33] Live Migration failure: Timed out during operation: cannot acquire state change lock I know that the real command that openstack executes virsh migrate --live instance-00000036 qemu+ssh://nova-compute-lnx001/system When i execute that command the same error is showed error: Timed out during operation: cannot acquire state change lock Versions: ii libvirt-bin 0.9.13-0ubuntu12.2~cloud0 programs for the libvirt library ii libvirt0 0.9.13-0ubuntu12.2~cloud0 library for interfacing with different virtualization systems ii python-libvirt 0.9.13-0ubuntu12.2~cloud0 libvirt Python bindings ii qemu-kvm 1.0+noroms-0ubuntu14.7 Full virtualization on i386 and amd64 hardware Any idea about this error? Thanks for advance Regards