Backup Exec 2012 is hanging after completion. Why?

I'm backing up files on a Windows 2008 server.  Some of them are exported from an SQL database, and some are just data files from programs.  According to the job log, the backup completes successfully, and so does the verify.  But then, the job just keeps running, and then times out as a failure.

What's going on?  There are no errors in the job log, other than the time out message and a sales pitch to use the SQL agent. 

We are not backing up the SQL files directly.  We export the files to the backup server, and then back them up there.

Any idea what's going on?

Thanks