Probleme de reception de Formulaire

Bonjour,

Voila j'ai recemment acheter un modele de site internet sur un site, et le formulaire ne fonctionne pas. Je ne m'y connais pas trop. Il me dit que le formaire s'envoie mais je ne recoie rien sur mon adresse mail. Pouvez vous m'aider.

Merci

Code dans page HTML :
<form id="contact-form" action="php/contact_synergy.php">
<div class="form-input-half-left form-input-border">
<div class="form-input-background opacity_2"></div>
<input id="name" type="text" name="name" value="nom *"/>
</div>
<div class="form-input-half-right form-input-border">
<div class="form-input-background opacity_2"></div>
<input id="email" type="text" name="email" value="email *"/>
</div>
<div class="form-input-large form-input-border">
<div class="form-input-background opacity_2"></div>
<input id="phone" type="text" name="phone" value="tel *"/>
</div>
<div class="form-input-textarea form-input-border">
<div class="form-input-background opacity_2"></div>
<textarea id="message" name="message">message *</textarea>
</div>
<div id="response-form">
<p>Message envoyé! Merci!</p>
<span id="form-warning">Tous les Champs sont nécéssaire*)</span>
<span id="server-error"></span>
</div>
<div class="form-buttons">
<div id="form-reset">
<p>EFFACER</p>
</div>
<div id="form-send" data-sending-txt="ENVOI...">
<p>ENVOI</p>
</div>
</div>

</form>


Code dans fichier PHP :

<?php
$senderName = $_POST['senderName'];
$senderEmail = $_POST['senderEmail'];
$senderPhone = $_POST['senderPhone'];
$senderMessage = mysql_escape_string($_POST['senderMessage']);

$siteName = "mon site";
$to = "***@***";

$headers = "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";

$headers .= "From: " . $siteName ." \n";
$headers .= "Reply-To: " . $senderEmail . "\n\n";



$toSubject = "Message from $senderName via $siteName";
$emailBody = "<strong>From</strong>: $senderName <br />
<strong>Email</strong>: $senderEmail <br />
<strong>Phone</strong>: $senderPhone <br /> <br />
<strong>Message</strong>: <br /><br />
". nl2br($senderMessage);
$message = $emailBody;

$okMsg = "";
if( $to != "***@***" )
{
$ok = mail($to, $toSubject, $message, $headers);
}
else{
$ok = true;
$okMsg = "Please change the '" . $to . "' to your own email address!";
}

if($ok){
$okMsg = "";
}
else{
if( $okMsg != "" )$okMsg = "SERVER BUSY, TRY AGAIN LATER! THANK YOU!";
}

$result = array(
'result' => $ok,
'msg' => $okMsg);

echo json_encode($result);
?>