[Dovecot] default_pass_scheme = PLAIN-MD5 dont work :(

[mancausoft]

I config postfix+mysql+dovecot for SASL SMTP autentication.
It works if set:
default_pass_scheme = PLAIN
and store plain-text password in mysql

I'm change default_pass_scheme = PLAIN with 
default_pass_scheme = PLAIN-MD5

an store password in mysql with md5('passwd') 

and dovecotpw -s PLAIN-MD5 -p test
{PLAIN-MD5}

and md5("test") = 098f6bcd4621d373cade4e832627b4f6

but don't work:

Jan 24 13:02:31 domain postfix/smtpd[18461]: connect from
[x.x.x.x] 
Jan 24 13:02:37 domine dovecot: auth-worker(default): mysql: Connected
to localhost (mail_info) 
Jan 24 13:02:39 domain postfix/smtpd[18461]: warning: [x.x.x.x]: SASL
CRAM-MD5 authentication failed:
PDI3Nac3ODA2NjQ0Njg4MzMuMTE2OTY0Mzc1N0BrbHVnY3QtY3Jldz4= 
Jan 24 13:02:40 domain postfix/smtpd[18461]: lost connection after AUTH
from [x.x.x.x]

Why?? where are the errors??
 
 
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