Netbackup for Hyper-V

Master RHEL6, MSDP, NBU 7.6.0.1

We are trying to configure backups of hyper-V vms with NBu for hyper-V.

there is a clusster of 3 nodes and containing CSV. I have added the name of all nodes of cluster & cluster to master server's server list and then created policy of HYPERV type. and in hyper V tab, I added the name of cluster for hyper v machine name and then when i go to clients Tab.

I am able to see nodes of cluster in left pan, but left pan is blank & not showing any machine.

(we are not using hyper server as media server.)

Cluster is WIn2012 r2 standard

kindly tell me if i am missing something. what can be reason of this.