Outlook 2003 Pst

Below is the message. I have read responses. However here is what I did.
I had Office 2000 / Outlook Express. I upgraded to Office 2003.
I opened Outlook. I imported all the folders/files from Inbox. This is an IMAP account.
From the mail.server.com I chose a new email. I moved it to a folder named 'Victory'. The local inbox folder Victory has about twenty text messages. Less than
30 kb. When I moved from Imap inbox to local inbox/victory I got the message pasted below. This folder is a tiny *.dbx that was imported from Outlook Express.
Obviously there is no exceeding maximum size. However, if I were to take the whole of local Inbox all the folders and files would be around 3gb. I don't know what to do. Any thoughts will be helpful. thanks


" The file C:\Documents and Settings\Application data\ Microsoft\Outlook\\Outlook2 (pst) has reached its maximum size. To reduce the amount of data in its file- select some items that you no longer need and permanently delete them by pressing SHIFT+DELETE. You could also consider using the new Outlook Personal Folder file (.pst) introduced with Outlook 2003 that provides greater capacity for storing items and folders."

Here is the procedure for importing your messages from Outlook Express to Ooutlook 2003:
Import your messages or account from Outlook Express to Outlook - Outlook - Office.com
Was this the method you used?

The following would be useful in the event of having an extra large file:
Reduce the size of a data file - Outlook - Office.com