On my development and test machine, (Win XP Pro & Win 2003 server respectively), I was able to deploy my .net application succesfully. However when I deploy it to a Win 2000 machine, I am getting the following error:

Server Error in '/myapp' Application.
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Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.Hosting.ISAPIWorkerRequestInProc.GetServerVariable(String name) +1618
   System.Web.Security.WindowsAuthenticationModule.OnEnter(Object source, EventArgs eventArgs) +593
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

Someone on this forum suggested that the use of a "clean" web.config managed to work. However, I have tried that; it doesn't work for me and I am still getting the same error. Please help. Thanks!