dovecot - Jul 2013 - plugin expire

Hi everybody,

	I'm trying to configure the expire plugin, unsuccessfully. This is my 
configuration, the part related to this plugin. Could somebody give a look to 
it? I can not figure out why is not working :-S. 

	Thank you, and regards!

	Felix

############ doveconf output
dict {
  expire = mysql:/etc/dovecot/dovecot-dict-expire.conf.ext
}

plugin {
  expire = Trash 15 Junk 15
  expire_dict = proxy::expire
}

protocol imap {
  mail_plugins = " zlib expire"
}

########### dovecot-dict-expire.conf.ext
# CREATE TABLE virtual_expires (
#   username varchar(100) not null,
#   mailbox varchar(255) not null,
#   expire_stamp integer not null,
#   primary key (username, mailbox)
# );

map {
  pattern = shared/expire/$user/$mailbox
  table = virtual_expires
  value_field = expire_stamp

  fields {
    username = $user
    mailbox = $mailbox
  }
}