Please need help with postfix and smtp!

["Julien" <nospam-tuxmux@gmail.com>]

Hi everybody,
I've got a problem with my smtp.

I'm using postfix, courier with mysql and sasl altogether.

My password are crypted with md5 and stored in the postfix database.

Pop and imap work alright but not the smtp.
It seems it doesn't translate the md5 password cause
when i put the password in clear it's working!

How can I activate the md5 support in the smtp??

Here's what my smtpd.conf looks like:

pwcheck_method: auxprop
auxprop_plugin: sql
mech_list: plain login cram-md5 digest-md5
sql_engine: mysql
sql_hostnames: 127.0.0.1
sql_user: user
sql_passwd: pass
sql_database: database
sql_select: select password from mailbox where username='%u@%r'

Is there any other file for it's configuration?

Thanks!