Hi Karen,
How large is your PST file? There is a 2 GB file size limit on every
version of Outlook except the latest (Outlook 2003). Errors like this
commonly crop up when you reach 95% of this file size limit. The PST is not
necessarily corrupt, but the file architecture of a pst is such that it
tries to compress the data in the file to be able to continue to function.
Even if the size is not an issue, I'd try to create a new Outlook
profile (which you need to be in Corporate or Workgroup mode to do. If
you're not, no worries I'll include an article on how to switch. You can
tell by going to help and about Microsoft Outlook. It'll say in the first
or second line which mode you're in.) Make a new profile and a new PST
(again I will include articles on how) and then go to File > Open > Personal
Folder file (.pst). Point it to your old PST file and open it. Then drag
and drop what you want from it. You likely don't want to import it for two
reasons:
a) if you are at your file size limit, you'll just recreate the problem
b) if it's corrupted, you'll just recreate the problem.
Back up everything before doing this so you don't loose data. If this does
not work I'm sure someone else will have a better idea. MAKE SURE YOU HAVE
YOUR CD's

first rule of tech support.
Here's the articles:
195507.KB.EN-US OL2000: Switching from One Installation Type to Another
http://support.microsoft.com/default.aspx?scid=KB;EN-US;195507
196492.KB.EN-US OL2000: (IMO) How to Back Up, Restore, or Move Outlook Data
http://support.microsoft.com/default.aspx?scid=KB;EN-US;196492
195719.KB.EN-US OL2000: (CW) How to Back Up, Restore, or Move Outlook Data
http://support.microsoft.com/default.aspx?scid=KB;EN-US;195719
195717.KB.EN-US OL2000: (CW) How to Create a New Personal Folders (.pst)
File
http://support.microsoft.com/default.aspx?scid=KB;EN-US;195717
195718.KB.EN-US OL2000: (CW) How to Create a New E-mail Profile for Outlook
http://support.microsoft.com/default.aspx?scid=KB;EN-US;195718
Eric Polley
OSR3 Outlook/Office Setup Support
Karen said:
I am running office 2000. I can't open my personal folders. When I try,
it says "unable to display the folder" errors have been detected in the
file....outlook.pst. Then tells me to use the inbox repair tool, which i
did. It says it fixed it successfully and still when I click on the
personal folders, I get this same message. All my contacts are gone and all
my saved emails. Please can anyone help??