samba - Mar 2005 - how to access password-protected share in winxp

Hi guys,
I'm using smb3.0.10 in Mdk10.
I can access shares on winxp that is not protected by password.
But when the shares are password-protected, I cannot access them, eventhough I 
use the correct username and password. Btw, I try it using Konqueror, smb4k.
From googling around, I believe that this is related to kerberos thing? How do 
I solve this? Any directions will be much appreciated. Thanks.
-- 
Fajar Priyanto | Reg'd Linux User #327841 | http://linux2.arinet.org
01:39:56 up 3:20, Mandrakelinux release 10.1 (Official) for i586 
public key: https://www.arinet.org/fajar-pub.key