The remote server returned 403 forbidden

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webservice

Hi
i used the following code to get the response i got the response for login service but cannot get the response from the url (http://localhost:8080/geonetwork/srv/en/xml.metadata.get) and i ended up getting the error 403 forbidden

protected void Page_Load(object sender, EventArgs e)
    {
        string RequestXML = "<request>" +
                            "<username>admin</username>" +
                            "<password>admin</password></request>";
        string ServerURL = "http://localhost:8080/geonetwork/srv/en/xml.user.login";
        string ResponseXML = postRequest(RequestXML, ServerURL);
         //= ResponseXML.ToString();
        string ServerURL1 = "http://localhost:8080/geonetwork/srv/en/xml.metadata.get";
        string RequestXML1 = "<request>" +
            "<uuid>5915639e-777c-4339-93ad-c4037f2eeb77</uuid>" +
            "</request>";
        string ResponseXML1 = postRequest(RequestXML1, ServerURL1);
        Label1.Text = ResponseXML1.ToString();
    }
    private string postRequest(String RequestXML, string ServerURL)
    {
        int timeout = 90000;
        int connectionLimit = 10;
        string responseXML = string.Empty;
        try
        {
            HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(ServerURL);
            webRequest.Timeout = timeout;
            webRequest.KeepAlive = true;
            webRequest.ServicePoint.ConnectionLimit = connectionLimit;
            webRequest.Method = "POST";
            webRequest.ContentType = "text/xml";
            byte[] byteArray = Encoding.UTF8.GetBytes(RequestXML);
            Stream strm = webRequest.GetRequestStream();
            strm.Write(byteArray, 0, byteArray.Length);
            strm.Close();
            HttpWebResponse webResponse =(HttpWebResponse)webRequest.GetResponse();
            Encoding enc = Encoding.GetEncoding("utf-8");
            StreamReader reader = new StreamReader(webResponse.GetResponseStream(), enc);
            responseXML = reader.ReadToEnd();
            reader.Close();
            webResponse.Close();
            
        }
        catch (Exception ex)
        {
            throw (ex);
        }
        return responseXML;
    }

here is the code i used pl correct me where i went worng