I found the solution!

The problem was on "Remote management using SASL authentication". I didn't create special user for SASL. Create user command is

# saslpasswd2 -a libvirt USERNAME
Password:
Again (for verification):

That's all.


you can also try this one ( found here )

 virsh -c qemu:///system?authfile=/etc/ovirt-hosted-engine/virsh_auth.conf