[Dovecot] Store quota on passwd-file?? Not work

Hello all, I have installed Dovecot 1.2.15 and Postfix 2.7.1 on my Debian 6.This install no include MySQL, I prefer to store Password/User in a file... File /etc/dovecot/passwd contains :user2@domain.com:{CRAM-MD5}::::userdb_mail=maildir:~/Maildir userdb_quota_rule=*:bytes=300M File /etc/dovecot/users :user2@domain.com::3000:3000::/home/vmail/domain.com/user2/:/bin/false:: What is the correct syntax for my file to use a different per-user quota ? This example not work on my Dovecot :user2@domain.com:{CRAM-MD5}:3000:3000::/home/vmail/domain.com/user2::userdb_mail=maildir:~/Maildir userdb_quota_rule=*:storage=200Muser2@domain.com:{CRAM-MD5}:3000:3000::/home/vmail/domain.com/user2::userdb_quota_rule=*:bytes=200M Thx.