Windows Media Player Error Message C00D11B0 with Original Error Code C00D2EE6

I am receiving the following error when trying to view a training video clip
from the Microsoft Expression Web Quick Start pages.

1. I use an ISA 2004 Proxy Firewall for network internet access and the
Client workstation is configured with the Microsoft Firewall Client
2. I believe the WMP11 Player netwirk settings are configured correctly (
settings: RTSP/UDP=ON, RTSP/TCP=ON, HTTP=ON, Use Ports=OFF
3. There are a number of other videos on this page that are downloading and
playing OK

The error message seems to indicate the problem is with the streaming site
either being offline or too busy, and try viewing this video at an off peak
time.
Is this the root cause or could it still be a configuration problem with
either the ISA 2004 Firewall settings or the WMP11 config????

TIA
GJS

ERROR MESSAGE
Windows Media Player Error Message Help
You've encountered error message C00D11B0 while using Windows Media Player.
The following information might help you troubleshoot the issue.

Cannot play the file
Windows Media Player cannot play the file. You might encounter this error
message for one of the following reasons:
The server is not available (for example, the server is busy or not online).
Try again later.
A firewall or Group Policy setting might be blocking you from playing
streams that require the User Datagram Protocol (UDP).
If you are using a computer in a home environment, see Windows Help and
Support for information about configuring Windows Firewall. If you are using
a non-Microsoft firewall, see the documentation that came with that software
or hardware device.
If you are using a computer in a corporate environment, contact your network
administrator for more information. Note that if your corporate network is
running Microsoft Internet Security and Acceleration Server (ISA Server),
you might be able to resolve the problem by installing the ISA Firewall
Client (also known as the Microsoft Firewall Client) on your computer.
Your computer does not have sufficient resources, such as enough free memory
or a fast enough processor. Quit other programs, and then try again. If the
problem persists, you might need to upgrade your computer.
Technical Details
This error might have been triggered by an error in another program or
component of Windows. The following information describes the original
error.
Original Error Code Original Error Message
C00D2EE6 The server is currently unable to handle the request
due to a temporary overloading or maintenance of the server.