samba - May 2005 - WINS and multiple samba servers one subnet

Hi,

I think I am not getting WINS to work correctly in my network.  Here is the
setup, any advise would be greatly appreciated:

3 Samba servers:
  1. IBBFILE (Old samba server 2.2.8) being replaced by GT-IBB. I have moved
about 70% of the users already.
  2. GT-IBB (New samba server to replace IBBFILE samba-3.0.10-1.4E RHEL)
  3. GT-BIOLAB (Samba server for students samba-3.0.10-1.4E RHEL).
  4. There is a standalone windows 2000 server not configured as a domain
controller not running WINS at this point (Workgroup is just IBB, not
GT-IBB).  It is just a system with a local account, so It should not
interfere (WINS software is uninstalled and not running, I already checked
this).

I have configured GT-IBB to be WINS master and the other servers no to
include wins master support to avoid conflicts as follows:

1. smb.conf for IBBFILE:
  [global]
   workgroup = IBBFILE
   domain logons = yes
   os level = 35
   local master = no
   preferred master = no
   domain master = no
   domain logons = yes
   wins support = no
   wins server = XXX.XXX.XXX.15


2. smb.conf for GT-IBB which is the WINS server with IP XXX.XXX.XXX.15
  [global]
  workgroup = GT-IBB
  netbios name = ibbstaff
  netbios aliases = samba
  os level = 33
  domain master = yes
  preferred master = yes
  local master = yes
  domain logons = yes
  wins support = yes

3. smb.conf on GT-BIOLAB
  [global]
  workgroup = GT-BIOLAB
  netbios name = biolab
  netbios aliases = samba-biolab
  os level = 36
  domain master = no
  preferred master = no
  local master = no
  domain logons = yes
  wins server = XXX.XXX.XXX.15
  wins support = no

Is this correct?  I am getting error messages like:

May 13 09:41:55 arwen nmbd[16622]:   Doing a node status request to the
domain master browser at IP XXX.XXX.XXX.13 failed. (This is IBBFILE)
May 13 09:41:55 arwen nmbd[16622]:   Cannot get workgroup name.

My shares from GT-IBB are slow to display randomly, I already disabled the
webclient service on the windows xp machines.  I have remapped the "My
Documents" folder to the H: drive which is the home directory and sometimes
when you try to open "My Documents" it sits for up to 25 seconds
before
opening.

Thanks for any help/tip you can provide.