Cannot open messages after "Move Mailbox" used on Exch2003

I have an Exchange 2003 server and I am creating a second mailbox store to move several mailboxes to this store. I created the store and successfully moved a test mailbox over which has about 10 messages. Now when I access this mailbox using Outlook 2002, I can see the messages in the inbox, but cannot open them. The error I recieve is "Unknown Error: The message cannot be opened".

Do I need to change the message store location on the user account as well?

Thanks

SM