dohttppost error

[Mohandes]

hi;
Some time ago I've started writing a program that the ability to login to the website and submitting website form to be had but i got some error i use this cod:

 public HttpURLConnection dohttppost(URL targetUrl, String content, String cookie) throws IOException {
        HttpURLConnection urlConnection = null;
        HttpURLConnection urlConnection2 = null;
        DataOutputStream dataOutputStream = null;
        DataOutputStream dataOutputStream2 = null;
        try {


            urlConnection = (HttpURLConnection) (targetUrl.openConnection());
            urlConnection.setDoInput(true);
            urlConnection.setDoOutput(true);

            urlConnection.setRequestProperty("Cookie", cookie);
            urlConnection.setRequestProperty("Content-Type", POST_CONTENT_TYPE);
            urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3");
            urlConnection.setRequestProperty("Connection", "Keep-Alive");
            HttpURLConnection.setFollowRedirects(true);
            urlConnection.setRequestMethod("POST");
            dataOutputStream = new DataOutputStream(urlConnection.getOutputStream());
            dataOutputStream.writeBytes(content);
            dataOutputStream.flush();
            dataOutputStream.close();
            return urlConnection;
        } catch (IOException ioException) {
            System.out.println("I/O problems while trying to do a HTTP post.");
            ioException.printStackTrace();
            if (dataOutputStream != null) {
                try {
                    dataOutputStream.close();
                } catch (Throwable ignore) {
                }
            }
            if (urlConnection != null) {
                urlConnection.disconnect();
            }

            throw ioException;
        }
    } 

I already login to the site and I want to submitted site form so i use this cod:

HttpURLConnection urlConnection = dohttppost(new URL("http://tv.station.ir/ab.php"), content, cookie); 

and wesite url is: tv.station.ir/ab.php
Website forms like the following picture:

When I'm using the dohttppost method of operation Does correct but that page refers to another page form to Approving or final accepting like the following:
wesite url refers to: tv.station.ir/ab.php
again and form like the following picture:

now when i use this cod i got error:

URL ul = urlConnection.getURL();
HttpURLConnection urlConnection2 = dohttppost(ul, Scontent, cookie); 

but confirm form does not work!!!
and i can not send forms good because the forms has confirm form and refer to another page.
plz help me what should i do?

[copeg]

i got some error

What error? Without all the information we're left guessing.

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[Mohandes]

What error? Without all the information we're left guessing.

hi thx.
i can not set user agent or set cookies setpropety for urlConnection to send confirm Form again!
and i can not post confirm form!
if i try do that i got this error:
UrlConnection already connected or can not Setproperty again!!! but user agent is not set in the secound post!