qmail-ldap ssha passwords compatibility

I'm trying to migrate from qmail-ldap 1.03 patch 20040401 from slackware 9.1 x86 
to slackware 13.0 x86_64 or rhel 5.2 x86_64.

Until now, I stored passwords in md5crypt format in the ldap database and 
everything worked ok.
I migrated the database and now I store passwords in ssha format.

Is ssha encryption method compatible with qmail-ldap auth programs (auth_pop, 
auth_imap, auth_smtp) ?
I ask this because I can't authenticate at all.

Thanks in advance.
Leandro.

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