Samba-TNG acting as a BDC

[Test profile]

I am quite new to samba and am not sure this is the list I should be
posting to. I have installed samba-tng branch on rh 6.2 and have
configured it using the smb.conf file attached, however, I can not seem to
get my nt machines to see the domain. I get the error that the domain
controller can not be found. I'm sure it is something silly that I have
overlooked. Thanks in advance for your help. 

Lindi
Student Technician

Education is an admirable thing, but it is as well to remember that
nothing is worth knowing can be taught. - Oscar Wilde  
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[global]

#NetBIOS name isn't needed if it's the same as the hostname
netbios name = MYBDC 
workgroup = MYBDC 

#flat files that map Unix groups to NT type groups. 
#these files take the form unix_group = `Windows NT group''
domain group map = /opt/samba-tng/private/domaingroup.map
domain alias map = /opt/samba-tng/private/domainalias.map

#Domain controllers use user security and we need
#encrypted passwords (see ENCRYPTION.txt) 
security = user
domain logons = yes
encrypt passwords = yes 

#we need to specify the PDC on the BDC
password server = MYPDC 

#we don't need to win browser elections if there is a PDC
os level = 20 
domain master = no
preferred master = no 
local master = no

#WINS is the equivalent of DNS for NetBIOS. 
#There can only be one WINS server i a samba controlled domain
wins support = no
time server = yes

#the next lines are equivalent to the various profile details
#found in NT's User Manager
logon script = login.bat
logon drive = Z:
logon home = \\fileserver\%U
logon path = \\fileserver\profile\%U

#share all home directories 
[homes]
browseable = no 
writable = yes
comment = Users' home directories

#set up netlogon share for system policies and login scripts
[netlogon]
path = /opt/samba-tng/netlogon 
writable = no
guest ok = no 
comment = BDC netlogon share