Does your validator support (validate) the .dwt file extension?

Dear W3C:

When I tried to validate the following Dreamweaver template file
http://www.strokecenter.org/Templates/edu_temp.dwt

(file extension .dwt - but Expression Web uses the same file extension,
they just call it Dynamic Web Templates), I received this message: 

"Sorry, I am unable to validate this document because its content type
is application/octet-stream, which is not currently supported by this
service. 

The Content-Type field is sent by your web server (or web browser if you
use the file upload interface) and depends on its configuration.
Commonly, web servers will have a mapping of filename extensions (such
as ".html") to MIME Content-Type values (such as text/html). 

That you received this message can mean that your server is not
configured correctly, that your file does not have the correct filename
extension, or that you are attempting to validate a file type that we do
not support yet. In the latter case you should let us know that you need
us to support that content type (please include all relevant details,
including the URL to the standards document defining the content type)
using the instructions on the Feedback Page
<http://validator.w3.org/feedback.html> ."

Which reason is it? Is it because the validator does not currently allow
..dwt files to be run through it?

Thanks for your response.
Yours,

 
David Murray
murrayd@neuro.wustl.edu