Sayantan, It was a password error. Thanks. Josh Quoting Sayantan Bhowmick <sbhowmick@novell.com>:

Hi, If you are getting a reply with ldapsearch then you should be able to authenticate as that user. One of the possible causes of the -669 error is an invalid password. So check the password and make sure you are able to log in as that user.

-Sayantan