[Dovecot] sasl problem

[Yavuz Maşlak]

Thank you. dovecot starts.  But i have a problem. I can't login as apop. 
How can I correct that?

my dovecot.conf;
## Dovecot configuration file

base_dir = /var/run/dovecot/
auth_debug = yes
protocols = imap imaps pop3 pop3s
disable_plaintext_auth = no
ssl = yes
ssl_cert_file = /etc/ssl/dovecot/cert.pem
ssl_key_file = /etc/ssl/dovecot/key.pem
login_greeting = Mail Server Ready.
mail_location = maildir:/usr/local/virtual/%d/%n
first_valid_uid = 125
last_valid_uid = 125
first_valid_gid = 125
last_valid_gid = 125

protocol imap {
  mail_plugins = quota imap_quota
}
protocol pop3 {
  mail_plugins = quota
}
protocol lda {
  postmaster_address = postmaster at test.com
}
auth default {
  mechanisms = plain login apop cram-md5
  passdb sql {
    args = /usr/local/etc/dovecot-sql.conf
  }
  userdb sql {
    args = /usr/local/etc/dovecot-sql.conf
  }
  socket listen {
    client {
      path = /var/spool/postfix/private/auth
      mode = 0660
      user = postfix
      group = postfix
    }
  }
}

> 
> 
> Try removing the socket (/var/spool/postfix/private/auth) before
> starting dovecot.
>