[Dovecot] SSHA256 password too short

Hi all

I am upgrading a mail system. So I installed aside a new server with debian lenny dovecot 1.2 from backports , postfix 2.5, mysql 5. I recovered the database from the actual production system with a dump. But when i started testing I found this in my logs

Sep 13 09:45:07 auth-worker(default): Info: sql(user@domain.tld,127.0.0.1): Password mismatch Sep 13 09:45:07 auth-worker(default): Error: ssha256_verify(user@domain.tld): SSHA256 password too short Sep 13 09:45:07 auth-worker(default): Warning: Invalid OTP data in passdb Sep 13 09:45:07 auth-worker(default): Warning: Invalid OTP data in passdb

But the same users gets connected normally to the production system.

I use mysql as driver and my default_schema is md5

Any ideas ??

Thanks in advance