Errror using IMAP in OE to upload mail

Hi,

I want to upload user’s local Outlook express mail thru IMAP to Domino 654, when I drag and drop the mail to the IMAP folder in OE, it gives me this error.

“Your message could not be uploaded to IMAP server. The server was refused to accept it.”

and the error detail as follow

"APPEND Note item not found

Configuration:

Account: [my IP]

Server: [my IP]

User name: User999

Protocol: IMAP

Port: 143

Secure(SSL): 0

Code: 800cccd2

"

Anyone encounter this before? Thanks!