Unable to activate media server after IP change

Hi

Running environment:

Master Server: Netbackup version 7.6.0.3 running on Red Hat Linux 6

Media Server: netbackup version 7.6.0.4 running on Red Hat Linux 6

We have changed the IP address of the media server, and after the change we are able to ping the media server from the master, and vice versa. I even see Media server under Host properties as connected. But Under Devices - Media Server, i am unable to Activate the media server. It fails with error EMM database error 196. Can someone please guide me as to how i can resolve this issue? This is urgent so quick reply is appreciated. Thanks.