Application Server Unavailable

From: Jon (anonymous_at_discussions.microsoft.com)
Date: 03/31/04 

Date: Wed, 31 Mar 2004 00:51:13 -0800

Hello all. I'm trying to run an aspx app on a Windows 2000 Advanced Server machine and I'm getting the error:

"Server Application Unavailable. The web application you are
attempting to access on this web server is currently unavailable.
Please hit the "Refresh" button in your web browser to retry your
request. Administrator Note: An error message detailing the cause of
this specific request failure can be found in the system event log of
the web server. Please review this log entry to discover what caused
this error to occur."

In the event log I have 2 errors:

"The description for Event ID ( 0 ) in Source ( .NET Runtime ) cannot be
found. The local computer may not have the necessary registry
information or message DLL files to display messages from a remote
computer. You may be able to use the /AUXSOURCE= flag to retrieve this
description; see Help and Support for details. The following information
is part of the event: .NET Runtime version 1.0.3705.0- aspnet wp.exe -
Common Language Runtime Debugging Services: Application has generated an
exception that could not be handled."

Process id=0x8c0 (2240), Thread id=0xa2c (2604).

Click OK to terminate the application.

Click CANCEL to debug the application..

AND

"aspnet wp.exe (PID: 2240) stopped unexpectedly.".

Some suggestions involve changing the userName element to SYSTEM from machine, I've done this and no joy. Does anyone have any other suggestions?

Cheers,

Jon