Return XML from aspx

mirror222

I tried to write xml content(UTF-8 format) from an aspx script.
It works perfectly with ASP.NET Development Server, however I got this message in the Abyss Web Server X1 (v 2.9.0.1).

This page contains the following errors:
error on line 2 at column 6: XML declaration allowed only at the start of the document
Below is a rendering of the page up to the first error.

Screenshots:

Here is the source I used:

 public static void ResponseXML(HttpResponse response, int statuscode, string desc)
        {
            XmlDocument doc = new XmlDocument();
            XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
            doc.AppendChild(dec);

XmlElement root = doc.CreateElement("XML");
            root.SetAttribute("Version", "1.0");
            doc.AppendChild(root);

XmlElement xmlcode = doc.CreateElement("Code");
            xmlcode.InnerText = statuscode.ToString();
            root.AppendChild(xmlcode);

XmlElement xmldesc = doc.CreateElement("Desc");
            xmldesc.InnerText = desc;
            root.AppendChild(xmldesc);         

response.StatusCode = statuscode;

response.Clear();
            response.ContentType = "text/xml; charset=utf-8";     
            response.Write(doc.OuterXml);
            response.End();  
        }

Is there any specific configuration to make it work? Your reply will Highly appreciated.
Thank you!