The file used has a PST extension but it's stored, typically, in the
C:\Documents and Settings\<user name>\Local Settings\Application
Data\Microsoft\Outlook folder. So, you might only have a month old copy of
the file.
Check out the info here also for potential help:
http://www.howto-outlook.com/howto/backupandrestore.htm
>I usually back up C: monthly and C:\Documents and Setting\My Documents
>daily
[quoted text clipped - 5 lines]
> to
> the internal hard drive.