[Dovecot] dovecot auth server problem PAM handshake imap-login

[emc]

Hi,
i have a big problem with dovecot...
PAM auth problem i guess, but don't know how to sort it out...
Down the log and the dovecot.conf.

Please soemone can tell me what's broken there?
Thanks a lot

*************************
HERE log
*************************
Jun  9 14:49:46 vps dovecot: pop3-login: Can't connect to auth server at
default: Resource temporarily unavailable
Jun  9 14:49:46 vps dovecot: imap-login: Timeout waiting for handshake from auth
server. my pid=14681, input bytes=0
Jun  9 14:49:46 vps dovecot: imap-login: Can't connect to auth server at
default: Resource temporarily unavailable
Jun  9 14:49:46 vps dovecot: imap-login: Timeout waiting for handshake from auth
server. my pid=14681, input bytes=0
Jun  9 14:49:46 vps dovecot: imap-login: Timeout waiting for handshake from auth
server. my pid=14682, input bytes=0

*************************
HERE my doveconf -a
*************************

# 1.0.15: /etc/dovecot/dovecot.conf
base_dir: /var/run/dovecot
log_path:
info_log_path:
log_timestamp: %Y-%m-%d %H:%M:%S
syslog_facility: mail
protocols: imap pop3 imaps pop3s
listen:
ssl_listen:
ssl_disable: no
ssl_ca_file:
ssl_cert_file: /etc/ssl/certs/dovecot.pem
ssl_key_file: /etc/ssl/private/dovecot.pem
ssl_key_password:
ssl_parameters_regenerate: 168
ssl_cipher_list:
ssl_verify_client_cert: no
disable_plaintext_auth: no
verbose_ssl: no
shutdown_clients: yes
nfs_check: yes
version_ignore: no
login_dir: /var/run/dovecot/login
login_executable(default): /usr/lib/dovecot/imap-login
login_executable(imap): /usr/lib/dovecot/imap-login
login_executable(pop3): /usr/lib/dovecot/pop3-login
login_user: dovecot
login_greeting: Dovecot ready.
login_log_format_elements: user=<%u> method=%m rip=%r lip=%l %c
login_log_format: %$: %s
login_process_per_connection: yes
login_chroot: yes
login_greeting_capability: no
login_process_size: 64
login_processes_count: 3
login_max_processes_count: 128
login_max_connections: 256
valid_chroot_dirs:
mail_chroot:
max_mail_processes: 1024
verbose_proctitle: no
first_valid_uid: 500
last_valid_uid: 0
first_valid_gid: 1
last_valid_gid: 0
mail_extra_groups:
mail_access_groups:
mail_privileged_group: man
default_mail_env:
mail_location: mbox:~/mail/:INBOX=/var/mail/%u
mail_cache_fields: flags
mail_never_cache_fields: imap.envelope
mail_cache_min_mail_count: 0
mailbox_idle_check_interval: 30
mail_debug: yes
mail_full_filesystem_access: no
mail_max_keyword_length: 50
mail_save_crlf: no
mail_read_mmaped: no
mmap_disable: no
mmap_no_write: no
dotlock_use_excl: no
fsync_disable: no
lock_method: fcntl
maildir_stat_dirs: no
maildir_copy_with_hardlinks: no
maildir_copy_preserve_filename: no
mbox_read_locks: fcntl
mbox_write_locks: fcntl
mbox_lock_timeout: 300
mbox_dotlock_change_timeout: 120
mbox_min_index_size: 0
mbox_dirty_syncs: yes
mbox_very_dirty_syncs: no
mbox_lazy_writes: yes
dbox_rotate_size: 2048
dbox_rotate_min_size: 16
dbox_rotate_days: 1
umask: 63
mail_drop_priv_before_exec: no
mail_executable(default): /usr/lib/dovecot/imap
mail_executable(imap): /usr/lib/dovecot/imap
mail_executable(pop3): /usr/lib/dovecot/pop3
mail_process_size: 256
mail_plugins:
mail_plugin_dir(default): /usr/lib/dovecot/modules/imap
mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3
mail_log_prefix: %Us(%u):
mail_log_max_lines_per_sec: 10
imap_max_line_length: 65536
imap_capability:
imap_client_workarounds: outlook-idle
pop3_no_flag_updates: no
pop3_enable_last: no
pop3_reuse_xuidl: no
pop3_lock_session: no
pop3_uidl_format(default):
pop3_uidl_format(imap):
pop3_uidl_format(pop3): %08Xu%08Xv
pop3_client_workarounds:
pop3_logout_format: top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
managesieve_max_line_length: 65536
managesieve_implementation_string: dovecot
sieve_storage:
sieve:
auth default:
  mechanisms: plain login
  realms:
  default_realm:
  cache_size: 0
  cache_ttl: 3600
  executable: /usr/lib/dovecot/dovecot-auth
  user: root
  chroot:
  username_chars:
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@
  username_translation:
  username_format:
  master_user_separator:
  anonymous_username: anonymous
  krb5_keytab:
  gssapi_hostname:
  verbose: no
  debug: yes
  debug_passwords: no
  ssl_require_client_cert: no
  ssl_username_from_cert: no
  count: 1
  worker_max_count: 30
  process_size: 256
  passdb:
    driver: pam
    args: session=yes dovecot
    deny: no
    pass: no
    master: no
  userdb:
    driver: passwd
    args:
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