[Fedora-directory-users] Problem with users' passwords

I've migrated some users from openldap to fds-1.0.4. I got the ldif file with ldapsearch. Then, the resulting user ldif file was transferred to fds through the Directory Server Console via the "Import Databases" option under the "Tasks" tab. Everything seems fine. All users' data are imported to fds which can be verified in the Console. There's one problem, however. None of these users can log in. Their passwords are rejected with invalid credentials error. However, if I change their passwords manually in the Directory Console, they can log in fine! Is there a way to transfer their passwords correctly?! Thanks in advance, SWA