Reading Xml

I got a little piece of ASP code to read from a remote url, which is expected to be an xml, like a RSS feed, and echo the content out to be processed by downstream xml processor. The code is like this:

<%response.ContentType="text/xml"%><%
Response.Buffer = false
Dim objXMLHTTP, xml, url, text
Set xml = Server.CreateObject ("Microsoft.XMLHTTP")
url = Request.QueryString("url")
xml.Open "GET", url, false
xml.Send
text = xml.ResponseText
Response.write(text)
Set xml = Nothing
%>

Using firefox, I get the request.responseXML object back from the code above, works fine. But in IE, the request.responseXML is returned null, but request.responseText did show the entire xml file.

My question is how should I make change to the above code to let IE honor the request.responseXML object? I gues the xml is somewhat ill formatted and IE can not recognize it as an xml.