Most
likely the MIME-Type is not set for .xod extension. They get a 404 because
their web server does not know how to handle the resource
"data/flash_sample.xod".
They can do three things:
1. Set up the MIME-Type correctly on
the servers hosting the .xod file. The common mime-type is "application/vnd.ms-xpsdocument"
if they want the xod to be viewable in IE's XPS viewer, or they can use the
generic "application/octet-stream".
2. Change the extension of the .xod file. Most likely, .bin should be fine
because .bin have "application/octet-stream" MIME type.
3. Use the WebViewerStreaming sample we have and create a simple web service
that will serve the .xod files.
This is a server policy matter (server decides whether to serve the file or
not) so there's really nothing we can do on the client side.
It could also be that the file permission prevents the web server from
accessing the file itself, thus another 404.