That error usually indicates a corrupted DBX file.
If the error occurs on opening, the folders.dbx is a likely candidate. But if you have OE
set to go directly to the Inbox (or download mail on opening), the other likely candidate
is the Inbox.dbx.
For a corrupted Inbox (OE5+):
- Close Outlook Express
- Rename the file Inbox.dbx to Inboxold.dbx You can use Start, Find (or Search), Files or
Folders, Inbox.dbx to find it. On Win2000 you need enable the display of Hidden or System
files in the folder options and XP you need to use the advanced options to find Hidden or
System files.
- Open Outlook Express again.
- It will create a new empty Inbox.
- The following program may be able to recover some of the messages from the Inboxold.dbx
file.
DBXtract - http://www.oehelp.com/DBXtract/Default.aspx
- You can then open OE and select the Inbox and drag the recovered EML files back into it.

Signature
Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm
> Windows ME, Outlook Express 5.5
>
[quoted text clipped - 10 lines]
>
> THANK YOU IN ADVANCE FOR YOU TIME - Much Appreciated !