Backup Exec 14 have some issue

Hi guys,

We have some issue with BE 14 and its related to Tape.

first Error:

Final error: 0xe0000900 - The requested media is not listed in the media index and could not be mounted. To add the media's catalog information to the disk-based catalogs, run an inventory operation on the media and resubmit the Catalog operation.

Second

Final error: 0xe000fe1f - The device cannot be found.

Backup- QIQFIN01.qiqatar.localV-79-57344-65055 - Snapshot Technology: Initialization failure on: "QIQFIN01.qiqatar.local". Snapshot technology used: No.
Snapshot technology error (0xE000FE1F): The device cannot be found.

plz find the attachments also..