Hi,
Check whether the device is being correctly recognised in the "Device Manager" of the operating system...
Check whether the device is listed in the HCL for 10.1
Symantec Backup Exec for Windows Servers (tm) 10d (10.1) Hardware Compatibility List. Includes HCL information for supported drives, libraries, virtual tape devices, fibre-channel HBAs, switches, routers/bridges, and iSCSI components. For printing purposes, the latest version of Acrobat is recommended.
http://support.veritas.com/docs/281670.
Also refer to
How to resolve hardware communication/detection issues with Backup Exec
http://support.veritas.com/docs/237047
After replacing or upgrading a Robotic Library or related hardware component, Backup Exec is unable to use the hardware device for backup and restore operations.
http://support.veritas.com/docs/242235
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