Can't backup open files

[DLM328]

On my desktop. I can't backup my Outlook.pst file while Outlook is open. If I close it. It works fine. The backup is fine on my laptop regardless if Outlook is open, or closed. Both computers are Windows XP (32-bit).
Thank You,
Douglas L McDuffie

[Adrian (Softland)]

Hi,
Do you run the backup from an administrator account?

Also make sure the Volume Shadow Copy service is started and properly working.