make connection alive

[Andrey V. Panov]

Hi all.
I want use single connection (for auth case) for all my requests.
By default it's should keep connection alive but after my POST request it's
close it! (cheking with nestat).

HttpClient v4.0.3. Server is IIS (not sure about version)

I need make auth to server via POSTing and keep connection for future use...
Correct me please if you see something wrong in my example:

EXAMPLE:
        DefaultHttpClient client = new DefaultHttpClient();

        HttpGet get = new HttpGet(Helper.indexUrl);
        HttpResponse response = client.execute(get);

        HttpEntity entity = response.getEntity();
        System.out.println(EntityUtils.toString(entity));
        Thread.sleep(5000);

//Connection still opened here

        ArrayList<NameValuePair> formparams = new
ArrayList<NameValuePair>();
        formparams.add(new BasicNameValuePair("username", "bitova"));
        formparams.add(new BasicNameValuePair("userpassword", "*****"));
        formparams.add(new BasicNameValuePair("B1", "enter"));
        UrlEncodedFormEntity entity2 = new UrlEncodedFormEntity(formparams,
"windows-1251");

        HttpPost post = new HttpPost(Helper.indexUrl + Helper.authUrl);
        post.setEntity(entity2);

        HttpResponse response1 = client.execute(post);
        System.out.println(EntityUtils.toString(response1.getEntity()));

//Connection already closed!
        System.out.println("check netstat");
        Thread.sleep(15000);