problem to config with ldap

[Jean-François Sénéchal]

Hello,

Debian sarge, cyrus 2.1.18, postfix 2.1

I have setup sasalauthd with my ldap server, but I have this error when 
I try to recevieve message from
my imap client :

syslog :

Jan  4 14:30:27 localhost cyrus/master[1197]: about to exec 
/usr/lib/cyrus/bin/imapd
Jan  4 14:30:27 localhost cyrus/imap[1197]: executed
Jan  4 14:30:27 localhost cyrus/imapd[1197]: accepted connection
Jan  4 14:30:31 localhost cyrus/imapd[1197]: badlogin: [172.17.2.84] 
plaintext titi SASL(-13): authentication failure: c

auth.log :

Jan  4 14:30:31 localhost saslauthd[937]: ldap_simple_bind() failed 81 
(Can't contact LDAP server).
Jan  4 14:30:31 localhost saslauthd[937]: Retrying authentication
Jan  4 14:30:31 localhost saslauthd[937]: ldap_simple_bind() failed 81 
(Can't contact LDAP server).
Jan  4 14:30:31 localhost saslauthd[937]: Authentication failed for 
titi: Retry condition (ldap server connection reset or broken) (-3)
Jan  4 14:30:31 localhost saslauthd[937]: do_auth         : auth 
failure: [user=titi] [service=imap] [realm=] [mech=ldap] [reason=Unknown]


My config :

saslauthd.conf :

ldap_servers: ldap://ldap.marche.be/
ldap_version: 3
ldap_timeout: 10
ldap_time_limit: 10
ldap_cache_ttl: 30
ldap_cache_mem: 32768
ldap_scope: sub
ldap_search_base: ou=Citoyens,ou=People,dc=marche,dc=be
ldap_filter: (uid=%u)

imapd.conf:

sasl_mech_list: PLAIN
allowapop: no
allowplaintext: yes
sasl_minimum_layer: 0
sasl_pwcheck_method: saslauthd

Somebody can help me ?

Thanks