[Dovecot] quota ignore trash

[JC]

Hi everybody, 
I have a server works good but the quota calculation includes trash, what i 
have to do in order to ignore trash in quota calculation?
My server imap is dovecot 1.0, my smtp server is postfix 2.3.8-2 and my webmail 
is horde 3.1.3 and imp 4.1.3.

my dovecot.conf : 
base_dir: /var/run/dovecot/
log_path: /var/log/mail.log
log_timestamp: %Y-%m-%d %H:%M:%S
protocols: pop3 imap
disable_plaintext_auth: 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_process_size: 64
login_processes_count: 5
login_max_processes_count: 256
login_max_connections: 512
first_valid_uid: 5000
last_valid_uid: 5000
first_valid_gid: 5000
mail_extra_groups: vmail
mail_location: maildir:/home/vmail/%d/%n
maildir_copy_with_hardlinks: yes
maildir_copy_preserve_filename: yes
mail_executable(default): /usr/lib/dovecot/imap
mail_executable(imap): /usr/lib/dovecot/imap
mail_executable(pop3): /usr/lib/dovecot/pop3
mail_plugins(default): quota trash imap_quota
mail_plugins(imap): quota trash imap_quota
mail_plugins(pop3): quota
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
imap_client_workarounds(default): outlook-idle delay-newmail
imap_client_workarounds(imap): outlook-idle delay-newmail
imap_client_workarounds(pop3): outlook-idle
pop3_uidl_format(default):
pop3_uidl_format(imap):
pop3_uidl_format(pop3): %08Xu%08Xv
pop3_client_workarounds(default):
pop3_client_workarounds(imap):
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
namespace:
  type: private
  separator: .
  prefix: INBOX.
  inbox: yes
auth default:
  mechanisms: plain login
  user: vmail
  passdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  userdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  userdb:
    driver: prefetch
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 432
      user: postfix
      group: vmail
    master:
      path: /var/run/dovecot/auth-master
      mode: 432
      user: vmail
      group: vmail
plugin:
  quota: maildir:storage=10240:messages=1000:ignore=Trash
  trash: /etc/dovecot/dovecot-trash.conf

my dovecot-sql.conf :
password_query = SELECT email AS user, password, '/home/vmail/%d/%n' AS 
userdb_home, 'maildir:/home/vmail/%d/%n' AS userdb_mail, 5000 AS userdb_uid, 
5000 AS userdb_gid FROM users WHERE email = '%u'
user_query = SELECT '/home/vmail/%d/%n' AS home, 'maildir:/home/vmail/%d/%n' AS 
mail, 5000 AS uid, 5000 AS gid, CONCAT('maildir:storage=', ROUND(quota/1000) ) 
AS quota FROM users WHERE email = '%u'