samba - Jul 2003 - Slow transfer between RH 9.0 and w2k, but not XP.

Hi
 
I just set up a server running RH9.0 and the latest Samba. The thing is
transfering files from a w2k to the samba server takes ages, but with the XP box
there's no problems. Is there a reigstry tweak or something that I need to
apply to the w2k box?
 
I read in an earlier post that it could be the NIC and bad linux drivers, but I
doubt this is the reason here sice it works just fine with the XP box. But
another thing is that there were no problems when I used RH7.1.
 
Can't figure this one out, hope someone out there can help me
 
Regards
Roy