samba - Sep 2001 - Swat login error

I am almost new to samba and the installation and every thing else went
smooth through Linux Redhat 6.2, but unfortunately I am unable to login
thought Swat while the user exist in this file "/etc/ smbpasswd"

This is the message coming from my browser using 

401 Bad Authorization
username or password incorrect


The mapping from windows and printing is excellent.


Can some one help me?


thanks