SYMPTOM:
I have Test_virtual.asp with the following:
<body>
included content starts here:
<!--#include virtual="/test_included.txt"-->
</body>
test_included.txt contains only:
This is the included file
When I browse to test_virtual.asp, I don't see the included file's text.
POSSIBLE CAUSES
I found one report that indicated the Includes are disabled by default in II7:
http://tech.mikeal.com/blog1.php/2008/08/05/server-side-includes-for-html-in-iis7
But the instructions assume you have access to the actual machine's control panel.