[Dovecot] md5 password is not working

hi, i setup a new mail server (dovecot-0.99.10.7) with ldap authentication (openldap-2.1.29-2). everything works properly until i switch the user's password from crypt to md5 in the ldap server (of course in this case in the ldap server it stores es {MD5}.... but dovecot gives such error messages:

dovecot-auth: Jul 29 17:30:08 Info: ldap(lfarkas@x.com): password mismatch

it it possible to use dovecot with openldap's md5 password? should I hav to change anything in dovecot's config file if i'd like to use other encrypt schema than crypt? thanks in advance.

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