ASP appending extra cache-control header

[ethan]

IIS/ASP appears to be adding extra (unwanted) cache-control headers to all
requests handled by ASP and ASP.NET. This does not happen for HTM, JS, GIF,
etc requests. How can I prevent the addition of this extra header?

I've set the following HTTP Headers for the entire "Default Web Site" under
IIS (ver 5):
Cache-Control: no-cache
Pragma: no-cache

When IE sends the following request:
==================================================================
GET /test/test.asp HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, application/vnd.ms-excel,
application/vnd.ms-powerpoint, application/msword, */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR
1.1.4322; .NET CLR 1.0.3705)
Host: XXXXXXXX
Connection: Keep-Alive
==================================================================
IIS returns the following response:
==================================================================
HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Date: Tue, 03 May 2005 22:36:02 GMT
Cache-Control: no-cache
Pragma: no-cache
Content-Length: 8
Content-Type: text/html
Set-Cookie: ASPSESSIONIDQSAQRRBR=HGHDDFJAFMCNEOAEIIPPCPPE; path=/
Cache-control: private
==================================================================
Here is the source of the ASP file:
==================================================================
<%= "ASP Test" %>
==================================================================