Folgende Umleitungen HTTPResponse Android

Ich brauche, um zu Folgen Weiterleitungen, die mir von HTTPost. Wenn ich ein HTTPost, und versuchen, die Antwort Lesen, bekomme ich die redirect-Seite html. Wie kann ich dieses Problem beheben? Code:

public void parseDoc() {
    final HttpParams params = new BasicHttpParams();
    HttpClientParams.setRedirecting(params, true);
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(
            "https://secure.groupfusion.net/processlogin.php");
    String HTML = "";
    try {
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
        nameValuePairs.add(new BasicNameValuePair("referral_page",
                "/modules/gradebook/ui/gradebook.phtml?type=student_view"));
        nameValuePairs.add(new BasicNameValuePair("currDomain",
                "beardenhs.knoxschools.org"));
        nameValuePairs.add(new BasicNameValuePair("username", username
                .getText().toString()));
        nameValuePairs.add(new BasicNameValuePair("password", password
                .getText().toString()));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        String g = httppost.getURI().toString();

        HttpResponse response = httpclient.execute(httppost);

        HTML = EntityUtils.toString(response.getEntity());
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String ResponseBody = httpclient.execute(httppost, responseHandler);
        sting.setText(HTML);

    } catch (ClientProtocolException e) {
    } catch (IOException e) {
    }

}