dovecot - May 2008 - Configuring Quota on Dovecot 1.0.13-1~bpo40+1

Hi all!  
 I have just updated my dovecot 1.0.rc15 to 1.0.13-1~bpo40+1 from
backports...  

 I need some help in configure quotas by user using mysql

Hi all!  
 I have just updated my dovecot 1.0.rc15 to 1.0.13-1~bpo40+1  

 I have a mysql table with this structure:  

 +----------+--------------+------+-----+---------+-------+
 | Field    | Type         | Null | Key | Default | Extra |
 +----------+--------------+------+-----+---------+-------+
 | email    | varchar(91)  | YES  |     | NULL    |       |
 | password | varchar(32)  | NO   |     |         |       |
 | quota    | bigint(20)   | NO   |     |         |       |
 | home     | varchar(255) | NO   |     |         |       |
 +----------+--------------+------+-----+---------+-------+  

 email returns email at domain.com  

 password returns the pass in mysql-crypt format  

 quota returns the quota in bytes(like 100000000)  

 home returns the path to the user home(like
/home/vmail/domain.com/email/)   

 the mail user and group id are 5000.  

 Now the question: How can I configure the quotas by user using
mysql... in dovecot 1.0.rc15 didn't work...  
 Thanks for your
help!