Twitter PHP reply code not working - php

Question

I have been trying to make Twitter reply code using PHP and it didn't work. When I run it it just post it as a tweet without the reply to the tweet id.
in_reply_to_status_id doesn't work when I run the code.
is there any solution?
<form action="<?php echo $PHP_SELF;?>" method="post">
<input type="submit" name="do"value="do"></input>
<input type="text" name="tweetid" placeholder="tweet id"></input>
<input type="text" name="message" placeholder="message"></input>
</form>
<?php
require_once('twitteroauth.php');
$connect=mysql_connect ("localhost","___","___");
mysql_select_db ("___");
if(isset($connect)){
$do=$_POST ['do'];
$message=$_POST ['message'];
$tweetid=$_POST ['tweetid'];
$consumerKey = '___';
$consumerSecret = '___';
$accessToken= '___';
$accessTokenSecret= '___';
if(isset($do)){
$tweet = new TwitterOAuth($consumerKey, $consumerSecret, $accessToken,$accessTokenSecret);
$tt=$tweet->post('statuses/update', array ('status'=>$message , 'in_reply_to_status_id' =>$tweetid));
}}
else {
print "error";
}
mysql_close ();
?>