[horde] Quota Display

[Michel Bulgado]

Hi list,

 I'm trying to let Horde IMP show the quota using a Dovecot IMAP server.

Dovecot 1.0.10

My dovecot config:

mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3): quota

quota= maildir:storage=102400
quota = maildir:ignore=Trash

IMP Settings in the imp/config/servers.php :

'quota' => array (
   'driver' => 'courier',
   'params' => array()
  )

 Courier driver is recommended for Dovecot servers in the
 imp/lib/Quota/courier.php.

I only see 
 Quota status: NO LIMIT 

I cannot see any quota bar  What could be wrong?