Backup Exec 2012 Linux agent not adding to Backup Server.

Hi all,

       I have installed Backup Exec 2012 package in a cisco c-series server and installed a Linux agent in a Virtual Machine to acheive a Disk to Disk backup..

I am successful with my Agent installation in the Linux machine and same can be seen below in the picture attached.

when i tried adding my Linux machine in server to schedule a backup hitting with the below issue..

 computer name and network connectivity is  fine.

someone  give me a solution to fix this issue..