Error while Migrating from Dovecot to Zimbra

[strikermdd]

Hello, i am migrating from my Dovecot IMAP server, to a Zimbra installation in CentOS 5.

I migrate fine all users from ldap to the zimbra, but when i tried to push all the messages from de old dovecot server to the zimbra server i give error with autentication:

will try to use PLAIN authentication on host1
will try to use PLAIN authentication on host2
From imap server [maceio] port [143] user [user@domain.com]
To   imap server [uniao] port [143] user [user@domain.com]
Banner : * OK [CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES MULTIAPPEND UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS AUTH=PLAIN] Dovecot ready.
Host maceio says it has CAPABILITY for AUTHENTICATE PLAIN
Error login : [maceio] with user [user@domain.com] auth [PLAIN]: 2 NO Authentication failed.

Trying LOGIN Auth mechanism on [maceio] with user [user@domain.com]
Error login : [maceio] with user [user@domain.com] auth [LOGIN] : 3 NO Authentication failed.

I use this line of command :

imapsync --buffersize 8192000 --noauthmd5 --nosyncacls --subscribe --syncinternaldates --host1 10.50.80.1 --authmech1 PLAIN --user1 user@domain.com --password1 mypassword --sep1 / --prefix1  --host2 uniao --authmech2 PLAIN --user2 user@domain.com --password2 mypassword

We use crypt in our hash passwords, its makes some diferent in any way ?

If anyone can help me with this i will very thankful.

Thanks.