[imp] preferences in ldap

[alois blasbichler]

hello list,

i am trying for days to install the new horde and imp
i use: suse linux 8.1, horde 2.1 and imp 3.1 openldap 2.1.4, kronolith, 
turba ...

the autentication i make with pam_ldap and the new imp works fin, but
my problem is to store the preferences in LDAP !!! (without ldap its ok)

i have made the rigths to write to ldap 
i have imported the users from my old ldap-DB and inserted only the objectclass 
hordePerson 

i get allways an error in horde.log: 

13:23:24 HORDE [info] [imp] Bind to server mir:389 with DN 
uid=ablasbichler,dc=sb-brixen,dc=it failed: [2] Protocol error [on line 169 
of "/srv/www/htdocs/horde/lib/Prefs/ldap.php"]
Nov 05 13:23:24 HORDE [notice] [imp] Login success for ablasbichler 
[10.53.5.21] to {mir:143} [on line 64 
of "/srv/www/htdocs/horde/imp/redirect.php"]
Nov 05 13:23:24 HORDE [info] [imp] Unable to modify preferences: [8] Strong(er) 
authentication required [on line 424 
of "/srv/www/htdocs/horde/lib/Prefs/ldap.php"]

thankyou for any help

luis