WD SmartWare 2.2: not sync when office file open?

Hi, 

But as in mentioned in numerous posts, Smartware 2.2.1 (Windows) as well as earlier versions do not back up .pst (outlook files) at all after initial backup!  I have just bought WD My Cloud,

  • Running WIndows VIsta including latest SPs
  • Updated firmware on WD MyCloud
  • Updated to Smartware 2.2.1
  • Updated to Smartware Pro
  • Did initial category backup incl Mail. Backup OK incl .pst
  • Set to hourly backup, wait > 24 hrs, and outlook .pst files are never backed up again.
  • Outlook is closed so files should back up

I’ve seen same problem in many posts, including old Smartware 1.6.x versions. But never a solution!!?

Hope you can assist.