samba - Apr 2005 - win xp pro: can't login to samba domain NT_STATUS_WRONG_PASSWORD

Dear List!

I am having a problem when trying to login from win xp prof sp 2 to samba 
3.0.10 pdc (with ldap) on my Gentoo box:

samba log says:

check_ntlm_password:  mapped user is: [TUXNT]\[root]@[P9WS]
ntlm_password_check: NT MD4 password check failed for user root
init_ldap_from_sam: Setting entry for user: root
check_ntlm_password:  Authentication for user [root] -> [root] FAILED with 
error NT_STATUS_WRONG_PASSWORD

Can you tell me what I did wrong? Do I have to path my windows registry for 
ntlm authentication?

Thank you in advance!!

my smb.conf
# Global parameters
[global]
	dos charset = 850
	unix charset = ISO8859-1
	workgroup = TUXNT
	netbios name = SRV
	server string = SAMBA-LDAP PDC Server %v
	interfaces = lo, eth0
	bind interfaces only = Yes
	update encrypted = Yes
	client schannel = Yes
	server schannel = Yes
	passdb backend = ldapsam:ldaps://127.0.0.1:636
	client NTLMv2 auth = Yes
	client lanman auth = No
	client plaintext auth = No
	log level = 3
	log file = /var/log/samba/log.%m
	max log size = 50
	time server = Yes
	socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
	add user script = /usr/local/sbin/smbldap-useradd -m
	add group script = /usr/local/sbin/smbldap-groupadd -p
	add user to group script = /usr/local/sbin/smbldap-groupmod -m
	delete user from group script = /usr/local/sbin/smbldap-groupmod -x
	set primary group script = /usr/local/sbin/smbldap-usermod -g
	add machine script = /usr/local/sbin/smbldap-useradd -w
	domain logons = Yes
	os level = 255
	preferred master = Yes
	domain master = Yes
	wins proxy = Yes
	wins support = Yes
	ldap admin dn = cn=Manager,dc=TUXNT,dc=LOCAL
	ldap delete dn = Yes
	ldap group suffix = ou=Groups
	ldap machine suffix = ou=Computers
	ldap passwd sync = Yes
	ldap suffix = dc=TUXNT,dc=LOCAL
	ldap ssl = no
	ldap user suffix = ou=Users
	vscan-clamav:config-file = /etc/samba/vscan-clamav.conf
	valid users = root
	admin users = root
	guest ok = Yes
	vfs objects = vscan-clamav

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