[Dovecot] problem migrating uw imap to dovecot on suse 9.3

hi all,

after i successed in install / configure dovecot, and transform mbox to maildir i got error in outlook expres. outlook expres is authenticated . dovecot accep user/passwd. when i try to receive folder list is giving me error: "downloading folder from server.ro" "one or more problems occurred downloading your list of folders from your account. The folder list may be inaccurate."

any ideea?

thanks.