Required media server is offline

Hello

Recently we had replaced one of drive in autoloader (2 drive). After re-configuring STU with device config wizard drive is visible but all my tape based backup jobs are queued up . It shows required media server is offline

But services are running . Did i missed anything in re-configuration?

NBU 7.5.4

Windows 2003 R2 STD master server

Windows 2008 R2 STD media server

HP Autoloader (LTO-4 2drives)