Delayed write problem with network shares under load

Hi,
We are having an issue with mapped network drives issuing a 'delayed write
failed' error under high load.
The server is 2003 server std, the clients are XP SP2.

Event log :
Type: Warning
Source: MRxSmb
Event ID: 50
Description: {Delayed Write Failed} Windows was unable to save all the data
for the file \Device\LanmanRedirector. The data has been lost. This error
may be caused by a failure of your computer hardware or network connection.
Please try to save this file elsewhere.
Data : Words :
0000: 00040004 00560002 00000000 80040032
0010: 00000000 c000020c 00000000 00000000
0020: 00000000 00000000 c000020c

Type: Information
Source: Application Popup
Event ID: 26
Description: Application popup: Windows - Delayed Write Failed : Windows was
unable to save all the data for the file \Cygnus Jobs\Current Jobs\Open
University\OU T2 generic Email Feb 02 (JN7538_DS7541)\TAB21. The data has
been lost. This error may be caused by a failure of your computer hardware
or network connection. Please try to save this file elsewhere.

After googling the problem it seems that other people have had similar
problems with no resolution. There does appear to be a hotfix for the error
if it provides a c000022c word in the detailed data. but that doesn't help
for this problem.

The switch that these computers are connected to isn't showing any errors on
either of the ports that the relevant computers are attatched to. When the
Lanman redirector is not under heavy load the computers network with no
problems.

Does anyone have any suggestions for further investigation or resolution ?



Thanks