Netbackup 7.6 Network issue

Hi all;

I'm newbie in Symantec Netbackup , i will be grateful if you could help me .

i have a problem regarding to Network in netbackup 7.6 as we implement 2 Network for Netbackup , one network for Netbackup management "public" and one private vlan for backup.

Master/Media Server and all the clients have 2 interfaces , one for public connections and one for private connections.
please check below:

Master Server/Media Server                                  clients
192.168.1.10" public" ------------------------------>     192.168.1.11 " public"
10.0.0.10 "private"------------------------------->       10.0.0.11    "private"

while i am login to Netbackup via public Network , i push client installation to the client on the private network .
after successful installation of  agent on the client , the client status " can't connect to socket "

Notice : there is no DNS . and the backup Vlan is private " no connections to the public".

please Advice 

Thanks

Deyaa