[Samba] Slow file openings on XP using Samba to Linux

[Bruce Hammond]

I am new to Samba and Linux and couldn't find any help looking through the 
Samba list archives.  I have a linux server with Samba installed and several 
XP machines accessing files on the linux machine using Samba.  Opening files 
takes a very long time, sometimes 20 or 30 minutes, whereas ftping the file 
takes 10 or 20 seconds.   I have tried using some of the Samba diagnostic 
tools like smbstatus,  tcpdump and strace, but I don't see any obvious 
reasons the file downloads take so long.  All packets go across without 
failing, there just seems to be many long pauses between packets.  Can anyone 
give me any idea how to diagnose why opening these files is taking so long?
Thanks,
Bruce Hammond