[Samba] can't get an XP machine to join my samba3 PDC's domain

[Bradley W. Langhorst]

I think i've got the new add machine script working
since the user is created okay

here is the relevant part of my conf file - 
	workgroup = LAUELAB
	netbios name = BITC
	server string = BITC/CAMIS Samba Server
	passdb backend = ldapsam
	passwd program = /usr/sbin/smbldap-passwd.pl %u
	username map = /etc/samba/smbusers
	unix password sync = Yes
	log level = 10
	syslog = 0
	log file = /var/log/samba/log.smbd.%m
	max log size = 50000
	time server = Yes
	total print jobs = 10
	add user script = /usr/sbin/smbldap-useradd.pl -a -m %u
	delete user script = /usr/sbin/smbldap-userdel.pl %u
	add group script = /usr/sbin/smbldap-groupadd.pl %g
	delete group script = /usr/sbin/smbldap-userdel.pl %g
	add machine script = /usr/sbin/smbldap-useradd.pl -w %u
	logon script = logon.cmd
	logon path = \\bitc\profiles\%u
	logon drive = H:
	logon home = \\bitc\%U
	domain logons = Yes
	os level = 64
	preferred master = True
	domain master = True
	dns proxy = No
	wins server = 132.177.44.30
	ldap suffix = dc=bitc,dc=unh,dc=edu
	ldap machine suffix = dc=bitc,dc=unh,dc=edu
	ldap user suffix = dc=bitc,dc=unh,dc=edu
	ldap admin dn = cn=ldapadmin,dc=bitc,dc=unh,dc=edu
	ldap ssl = no
	printer admin = root, bwlang
	hosts allow = 132.177.44.0/255.255.252.0
	printing = lprng

has anybody actually done this with samba3?
I have a level 10 log but its 10k lines so i won't post it here unless
somebody wants it

the message on the client is 
"There is not user session key for the specified logon session"

thanks!

brad