[imp] imap login problems

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Hi Ng,

i hope that you can help me - i have to despair.
Horde & imp are the latest. I use debian testing, with postfix & Courier 
imap.
All user are stored in mysql. Auth is pam with crypted passwords.
Login from Clients to pop / imap or to the secure Pop and Imap are working.
With horde i can log into horde with auth from pam and mysql postfixtable.
Login to imp are only working with pop - not with imap.
I have try so many things - but nothing helps.

Here are my mysql.log from pop and imap login and the mail.log from pop 
& imap login try's from imp. And at the bottom the error from auth.log

------------ mail.log with pop ------------------------------------
jupiter courierpop3login: Connection, ip=[::ffff:213.133.111.145]
jupiter courierpop3login: LOGIN: DEBUG: ip=[::ffff:213.133.111.145], 
command=CAPA
jupiter courierpop3login: LOGIN: DEBUG: ip=[::ffff:213.133.111.145], 
command=AUTH
jupiter courierpop3login: authdaemon: starting client module
jupiter courierpop3login: authdaemon: ACCEPT, username hnovak at dataportal.de
jupiter courierpop3login: LOGIN, user=hnovak at dataportal.de, 
ip=[::ffff:213.133.111.145]
jupiter courierpop3login: LOGOUT, user=hnovak at dataportal.de, 
ip=[::ffff:213.133.111.145], top=0, retr=0, time=0

--------------- mail.log with imap -----------------------
jupiter imaplogin: Connection, ip=[::ffff:213.133.111.145]
jupiter imaplogin: LOGIN FAILED, ip=[::ffff:213.133.111.145]


-------------- mysql.log with pop --------------------------
050331 18:23:26    7460 Connect     horde at localhost on
                   7460 Init DB     horde
                      8 Query       SELECT username, password, "", 
'1001', '1001', '/usr/local/virtual', maildir, quota, name, "" FROM 
mailbox WHERE username = "hnovak at dataportal.de"
                   7460 Init DB     horde
                   7460 Init DB     horde
                   7460 Query       SELECT 1 FROM horde_prefs WHERE 
pref_uid = 'hnovak at dataportal.de' AND pref_name = 'last_maintenance' AND 
(pref_scope = 'horde' OR pref_scope = 'horde')
                   7460 Init DB     horde
                   7460 Query       UPDATE horde_prefs SET pref_value = 
'1112286206' WHERE pref_uid = 'hnovak at dataportal.de' AND pref_name = 
'last_maintenance' AND pref_scope = 'horde'
                   7460 Quit
                   7461 Connect     horde at localhost on
                   7461 Init DB     horde
                      8 Query       SELECT username, password, "", 
'1001', '1001', '/usr/local/virtual', maildir, quota, name, "" FROM 
mailbox WHERE username = "hnovak at dataportal.de"
                   7461 Init DB     horde
                   7461 Quit

--------------------- mysql.log with imap -----------------------------
050331 18:24:09    7466 Connect     horde at localhost on
                   7466 Init DB     horde
                   7466 Init DB     horde
                   7466 Init DB     horde
                   7466 Query       SELECT pref_scope, pref_name, 
pref_value FROM horde_prefs WHERE pref_uid = 'hnovak at dataportal.de' AND 
(pref_scope = 'imp' OR pref_scope = 'horde') ORDER BY pref_scope
                     56 Query       SELECT username, password, "", 
'1001', '1001', '/usr/local/virtual', maildir, quota, name, "" FROM 
mailbox WHERE username = "hnovak at dataportal.de"
050331 18:24:14      56 Query       SELECT username, password, "", 
'1001', '1001', '/usr/local/virtual', maildir, quota, name, "" FROM 
mailbox WHERE username = "hnovak at dataportal.de"
050331 18:24:19      56 Query       SELECT username, password, "", 
'1001', '1001', '/usr/local/virtual', maildir, quota, name, "" FROM 
mailbox WHERE username = "hnovak at dataportal.de"
050331 18:24:24    7466 Quit


again: this error will only be shown, when i log trough imp with imap.
----------------------------- auth.log -----------------------------
jupiter postfix/smtpd[23944]: auxpropfunc error no mechanism available
jupiter postfix/smtpd[23944]: _sasl_plugin_load failed on 
sasl_auxprop_plug_init for plugin: sql
jupiter postfix/smtpd[23956]: sql_select option missing



Hans