Hello,
Firstly, kindly check if the device is compatible with BE v10.0 from the below mentioned link:
Symantec Backup Exec for Windows Servers (tm) 10.0 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/281669
Also, please note that the Changer must be detected in the Windows Device Manager. Unless its detected by Windows, Backup Exec will not be able to recognise it.
Regards
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