how to make backup on a remote LT0

Hi 

in my case LT0 attatched with DC and i installed a backup exec 2012 on aDC

and need to manage and administarte a backup exec from another server except a DC so i installed a backup exec on adiffrent server

now in need to make a backup fromthis diffrent backup exec server and saved it on remote LT0 

 i am tried to access a tap devise from a remote server but iam faild 

please advise