Exchange 2003 - logs not being flushed by Backup Exec

I am using Backup Exec to backup the Exchange 2003 database and usually it will flush the transaction logs after a successful backup.  I am getting successful backups but I'm seeing transaction logs dating back to 5/20/13.  They are beginning to take up alot of space but I'm not quite sure why the backups are not flushing the logs - they always have in the past.  

No errors in the app logs...I do see each night a 5008 event from the MSExchangeSA saying:

"The message tracking log file D:\Exchsrvr\servername.log\20130615.log was deleted" but that looks like it's just one log file...

I have about 10GB's of free space left on the drive the database is one...

Thanks in advance!
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Miguel Angel Perez MuñozConnect With a Mentor Commented:
vianceadminAuthor Commented:
Yep, I think that will do it.  I was trying to track down an issue with occasional backups failing and in the diagnosing process, I stopped backing up the public store to see if I would still get the same errors.  Changed it in BE and will wait to see when the backup happens tonight.  Thanks for the help!
Glen KnightConnect With a Mentor Commented:
The logs will be flushed only if you perform a full exchange aware backup.

If you are doing this than this can happen because something else is interfering like AntiVirus or AntiSpam software.  Have you updated this recently?

Another option is a corrupt log file.  If you are happy you have a backup of the DB then enable circular logging to flush the logs through.  Once done, disable circular logging and check the backups are once again flushing the logs.  Only enable circular logging if you are confident you have a full backup of the current database files.
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