Tapes not detected by Symantec Backup Exec 12.5

Dear All,

We have reinstalled our Symantec Backup Exec 12.5 Media Server (HP DL380 G5, Microsoft Windows Server 2008 Standard 32bit) after it had crashed. It has detected the tape library (Dell PowerVault 132t LTO3), but unable to show the tapes inside it. I have tried the following

Took inventory and it is successful without any errors

Installed the Tape Library Drivers form tools menu

Restarted both Tape Library and Server

but still no medial was showed, On the media tab.

Need a suggestion on this.

Thank You.