HELP on IIS 7.5 HTTP Response Headers

Hi,

I am a newbie in IIS in general and I would like to ask for help on an issue that we encountered when we migrated from IIS 6.0 to 7.5.

There was a web service app that had been hosted in that IIS 6.0 which is being consumed thru an HTTP GET from a linux box.

The request is set up like:

GET /###.asmx/function?Param1=#Value1&Param2=#Value2&Param3=#Value3&retType=b64\r\nHTTP/1.1\r

The response for this request used to contain http headers such as:

HTTP/1.1 200 OK

Date: Tue, 26 Jun 2010 20:22:47 GMT

Server: Microsoft-IIS/6.0

X-Powered-By: ASP.NET

X-AspNet-Version: 1.1.4322

Cache-Control: private, max-age=0

Content-Type: text/xml; charset=utf-8

Content-Length: 233

<?xml version="1.0" encoding="utf-8"?>

<##REPLY> ...  </##REPLY>

But after the web service app was migrated and hosted to IIS 7.5, the response to the HTTP GET does not have the headers anymore.

Thanks in advance.