Web Service on Win2003 fails after being moved from Win2000

[Tom]

Hi,

We have a web service (developed in C# framework 1) that run for some time
on Windows 2000. Recently we upgraded it to framework 2 and it runs
successfully
on Windows 2000 and XP.
However, we need to run it on new Windows 2003 box and the web service just
fails to run. The service just dies at login.

-----------------------------------------------------------------------------
ERROR(8/2/2006 5:55 PM):
FUNCTION: ProcessFile: Loop for processing lines
System.Web.Services.Protocols.SoapException: Server was unable to process
request. ---System.NullReferenceException: Object reference not set to an
instance of an object. at CustomerUpdateService..ctor() --- End of inner
exception stack trace ---
STACK TRACE: at
System.Web.Services.Protocols.SoapHttpClientProtoc ol.ReadResponse(SoapClientMessage
message, WebResponse response, Stream responseStream, Boolean asyncCall) at
System.Web.Services.Protocols.SoapHttpClientProtoc ol.Invoke(String
methodName, Object[] parameters) at
WService.CustomerUpdateService.SetAllCustomerStatu s(Char status, String
accessPassword) at COMP.BLAH.BLAHCustomerExtract.ProcessFile(String fileName)
SOURCE: System.Web.Services
----------------------------------------------------------------------------

Any help is greatly appreciated,
Tom