samba - May 2003 - specified network name no longer available (Profile not sync)

For some reason on my samba PDC (redhat 9, samba-2.2.7 with security 
patches) my XP Pro clients are closing their network connections 
before they sync the profile information to the server. Can anyone 
offer me a hint how to fix this? I'm a linux guy not a windows guy so 
I'm a bit perplexed. Is there a way to force it not to do that until 
the sync is done?

FWIW it's a dell workstation which came with XP Pro pre-installed (so 
I'm told)

I get the following error

DETAIL - The specified network name is no longer available.


This is driving me crazy, I've setup samba pdcs several times and 
NEVER seen this. Stupid windows.