[libvirt] pibvirt php help

sir i am trying to create ssh connention and i am able to connect with out password from terminal using virsh -c qemu+ssh://punit@192.168.102.133/system but this is not working with libvirt-php binding error :for libvirt-php ssh connection "Libvirt last error: cannot recv data: Resource temporarily unavailable" my php code is <?php $res1=libvirt_connect("qemu+ssh://punit@192.168.102.133/system",false); print_r($res1); printf ("\n"); if ($res1==false) { echo ("Libvirt last error: ".libvirt_get_last_error()); } ?> -- Punit Gupta M-Tect (jiit noida)