postfix + cyrus-sasl2 smtpd auth failed!!!

[asho <asho@asho.dyndns.org>]

hi...every debian users

Some days ago , I set up my mail server with postfix + sasl2.

I can easily use them with the sasldb methond.

Yet now I want to use the other method such as the getpwent or shadow.

So I edited the /etc/default/saslauthd with the strings

START=yes
MECHANISMS=getpwent

and postfix with the setup strings

smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = 
permit_sasl_authenticated,permit_mynetworks,check_relay_domains

then I restarted the saslauthd and postfix.

When I tried to send some mail through the mail server , It came out the 
password dialog.

I did typed the correct password but the server said wrong...

I am confused...

So I rewrote the saslauthd with the option MECHANISMS=shadow.

However I still couldn't send any mails.

Can someone give me some advice to solve the problem.

My packages were listed below

ii  postfix                       1.1.11.0-3                    A 
high-performance mail transport agent
ii  postfix-pcre                  1.1.11.0-3                    PCRE map 
support for Postfix
ii  postfix-tls                   1.1.11.0-3                    TLS and 
SASL support for Postfix snapshots
pi  libsasl2                      2.1.2-2                       
Authentication abstraction library.
ii  libsasl2-digestmd5-plain      2.1.2-2                       
DIGEST-MD5 module for SASL
ii  libsasl2-modules-plain        2.1.2-2                       Basic 
Pluggable Authentication Modules for SASL
ii  sasl2-bin                     2.1.2-2                       Programs 
for manupulating the SASL users database

thanks for all