[imp] can login only with pop

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hi Ng,

horde and imp are working fine. but i can only login wih pop3 to my 
courier-imap server.
A Imap login with imp fails. With mozilla/outlook the login works great.

Here is my servers.php

$servers['imap'] = array(
    'name' => 'jupiter IMAP Server',
    'server' => 'localhost',
    'hordeauth' => false,
    'protocol' => 'imap/notls',
    'port' => 143,
    'folders' => '',
    'namespace' => '',
    'maildomain' => 'dataportal.de',
    'smtphost' => 'jupiter.dataportal.de',
    'smtpport' => 25,
    'realm' => '',
    'preferred' => '',
    'dotfiles' => false,
    'hierarchies' => array()
);



$servers['pop'] = array(
    'name' => 'POP3 Server',
    'server' => 'jupiter.dataportal.de',
    'hordeauth' => false,
    'protocol' => 'pop3/notls',
    'port' => 110,
    'folders' => '',
    'namespace' => '',
    'maildomain' => 'dataportal.de',
    'smtphost' => 'jupiter.dataportal.de',
    'smtpport' => 25,
    'realm' => '',
    'preferred' => '',
    'dotfiles' => false,
    'hierarchies' => array()
);



hans