Help! Flash error: 1088 (Markup in doucment not well-formed)

I’m trying to use ASP.NET to retrieve data from the sql server, place in inside an xml and sends the xml to flash to display the data.

I’m getting
TypeError: Error #1088: The markup in the document following the root element must be well-formed.
at news_fla::mainTimeline/loaded()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at flash.net::URLLoader/onComplete()

This is my code:

ASP.NET

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    Dim adapter As SqlDataAdapter
    Dim ds As New DataSet
    Dim sql As String

    Dim con As New SqlConnection("data source = GN80000798-0\SQLEXPRESS2008; initial catalog = EL; integrated security = true")
    sql = "select * from news"
    Try
        con.Open()
        adapter = New SqlDataAdapter(sql, con)
        adapter.Fill(ds, "data")
        con.Close()

        Response.ContentType = "text/XML"
        Response.HeaderEncoding = Encoding.UTF8
        ds.WriteXml(Response.OutputStream, XmlWriteMode.WriteSchema)

        MsgBox("Done")
    Catch ex As Exception
        MsgBox(ex.ToString)
    End Try

End Sub

Flash

import flash.xml.*;

var newsrequest:URLRequest = new URLRequest(“http://localhost:1179/DB/DB.aspx”); //ASP.NET development server
var newsloader:URLLoader = new URLLoader();
var newsxml:XML;
var dvar:URLVariables = new URLVariables();
dvar.dummy = “dummy”;
newsrequest.data = dvar;
newsrequest.method = URLRequestMethod.POST;
newsloader.load(newsrequest);

newsloader.addEventListener(Event.COMPLETE, loaded);

titlenews.autoSize = TextFieldAutoSize.LEFT;
bodynews.autoSize = TextFieldAutoSize.LEFT;

function loaded(event:Event){
newsxml = new XML(event.target.data);
newsxml.ignoreWhitespace = true;
trace(newsxml);
}

HOWEVER, if i replace the
“ds.WriteXml(Response.OutputStream, XmlWriteMode.WriteSchema)”
with
"ds.WriteXml(“C:
ew.xml”)
it works. but the request for data varies (modifying sql statement in near future) and i don’t wish to create a new .xml for each of it.

Please tell me whats wrong with this…
or is there a better method?