How to restore few e-mails from brick level backup

Using  Be 2010R3, We are trying to restore few e-mails from Exch 2003 Brick level backup

This was backed up using BE 11d on tape

Error we get:

V-79-57344-37958 - The backup of resource '\\Exch2003\Microsoft Exchange Mailboxes' was written by a previous version of Backup Exec.  The maximum size for a backup set in that version was exceeded.  To restore the data, disable the 'Use Fast File Restore' feature, and run the restore job again. 

-we created disable the 'Use Fast File Restore'  key but no help.