[imp] no mails in inbox: c-client or config?

[V93r]

hello list,
i have the following setup:

debian 3.0
apache-ssl (.deb)
uw-imapd-ssl (.deb)
libc-client-ssl2001 (.deb)
horde2 (.tgz)
imp3 (.tgz)

i hand-installed horde & imp, since the .dep packages were missing 
files & didnt work.

logging in to horde via imp works fine. i see the imap login in the 
syslog. now i just cant see any mails in my inbox. if i fetch mail 
with my desktop imap client from the same server, it works fine (both 
encrypted and not). i tried to use a remote imap server with imp, 
which also workes fine.

so, might this be a wrong version of c-client, or is it a 
configuration issue with imp? here is my servers.php:


$servers['imap'] = array(
    'name' => 'IMAP Server',
     'server' => 'localhost',
     'protocol' => 'imap',
     'port' => 143,
     'folders' => 'mail/',
     'namespace' => '',
     'maildomain' => 'my.server.de',
     'smtphost' => 'my.server.de',
     'realm' => 'my.server.de',
     'preferred' => my.server.de'


any advice welcome,
gert