Job doesn't finish

Hi Experts...

I am having a problem...

I have a server with a tape, and i have a job backing up my data to the tape.

That's ok, the backup starts but it doensn't finish... in others companies works perfectly... but this doesn't.

What happen? starts normally, going on... going on... The Byte Count stops.

Ps: The Byte Count looks complete. 50 GB and there isn't a Green circle with Queued.

Someone can helps me?