Backup Exec 15

Hello

I NEED help! I installed Backup Exec 15 on a Windows 2008 and Dell TL2000  storage.

Installing BE 15 normally but I want to add in the BE storage but is not being recognize in the library.

I check on the OS and it was recognized but when I check up at the TL2000 the instalation is not working. 

what I have to do to install the TL2000 my BE 15?