Upload image in twitter using twitter api in php

hello,
I'm using below script for upload image but this script is not work for image uploading.

************************************************
<?php
require_once('TwitterOAuth.php');
include 'EpiTwitter/EpiCurl.php';
include 'EpiTwitter/EpiOAuth.php';
include 'EpiTwitter/EpiTwitter.php';
include 'EpiTwitter/TwitterConfig.php';
include("db.php");
?>
<form action="" method="post" enctype="multipart/form-data">
<input type="text" name="post_name" value="" />
<input type="file" name="post_image" />
<input type="submit" name="send" />
</form>
<?php
if(isset($_POST['post_name']) && !empty($_SESSION['TwitterUsername']))
{
$message=$_POST['post_name'];
$TwitterUsername=$_SESSION['TwitterUsername'];
$tw_sql=mysqli_query($connection,"SELECT oauth_token,oauth_token_secret FROM TwitterUpdate WHERE uname='$TwitterUsername'");
$row=mysqli_fetch_array($tw_sql,MYSQLI_ASSOC);
$oauth_token=$_SESSION['oauth_token'];
$oauth_token_secret=$_SESSION['oauth_token_secret'];
if(strlen($oauth_token)>0 && strlen($oauth_token_secret)>0 )
{
$Twitter = new EpiTwitter($consumer_key, $consumer_secret);
$Twitter->setToken($oauth_token,$oauth_token_secret);


$status=$Twitter->post_statusesUpdate(array('status' => $message));

$image = 'http://www.bitrebels.com/wp-content/uploads/2013/05/3d-printed-rose-geek-1.jpg';
$response = $Twitter->request('POST', $Twitter->url('https://upload.twitter.com/1/statuses/update_with_media'),
array(
'status' => $message,
'media[]' => "@{$image}"
));
echo $status->id_str;
}
}
?>
**********************************************
plz tell me where the problem my message is posts successfully but image is not upload....

please help

thanks