สอบถามเรื่องการส่ง Email ในขั้นตอนสมัครสมาชิกครับ ติดปัญหา Email ไม่ส่ง

<meta charset="UTF-8" />
<?php
include('Connections/condb.php');

$m_username = $_POST['m_username'];
$m_password = ($_POST['m_password']);
$m_name = $_POST['m_name'];
$m_address = $_POST['m_address'];
$m_zipcode = $_POST['m_zipcode'];
$m_email = $_POST['m_email'];
$m_tel = $_POST['m_tel'];

$check ="SELECT * FROM member  WHERE m_username='$m_username'";
$result1=mysql_db_query($database_condb, $check);
$num=mysql_num_rows($result1);

if($_POST["m_password"] != $_POST["conm_password"])
	{
		
		echo "<script>";
			echo "alert('Password not Match!!');";
			echo "window.location ='register.php'; ";
			echo "</script>";
	}

if($num > 0)
{
			echo "<script>";
			echo "alert('User นีมีผู้ใช้แล้ว!!');";
			echo "window.location ='register.php'; ";
			echo "</script>";

} else {


        $sql ="INSERT INTO member
		
		(m_username,  m_password, m_name, m_address,m_zipcode, m_email, m_tel)
		
		VALUES
		
		('$m_username', '$m_password', '$m_name','$m_address','$m_zipcode', '$m_email', '$m_tel')";
		
		$result = mysql_db_query($database_condb, $sql) or die("Error in query : $sql" .mysql_error());
}

		mysql_close();
		
		if($result){
		
		
	require_once('class.phpmailer.php');
	$mail = new PHPMailer();
	$mail->IsHTML(true);
	$mail->CharSet = "utf-8";
	$mail->IsSMTP();
	$mail->SMTPAuth = true; // enable SMTP authentication
	$mail->SMTPSecure = "ssl"; // sets the prefix to the servier
	$mail->Host = "smtp.gmail.com"; // sets GMAIL as the SMTP server
	$mail->Port = 465; // set the SMTP port for the GMAIL server
	$mail->Username = "[email protected]"; // GMAIL username
	$mail->Password = "xxxxxxxx"; // GMAIL password
	$mail->From = "[email protected]"; // "[email protected]";
	//$mail->AddReplyTo = "[email protected]"; // Reply
	$mail->FromName = "xxxxx";  // set from Name
	$mail->Subject = "ข้อมูลสมัครสมาชิกเว็บไซต์ xxxxxxx.com"; 
	
	$mail->Body = "ข้อมูลการสมัครสมาชิก";
	$mail->Body = $_POST['m_username'];
	//$mail->Body = $_POST['m_password'];
	//$mail->Body = $_POST['m_name'];
	//$mail->Body = $_POST['m_address'];
	//$mail->Body = $_POST['m_zipcode'];
	//$mail->Body = $_POST['m_email'];
	//$mail->Body = $_POST['m_tel'];

	$mail->AddAddress= $_POST['m_email'];// to Address

	//$mail->AddAttachment("thaicreate/myfile.zip");
	//$mail->AddAttachment("thaicreate/myfile2.zip");

	//$mail->AddCC("[email protected]", "Mr.Member ShotDev"); //CC
	//$mail->AddBCC("[email protected]", "Mr.Member ShotDev"); //CC

	$mail->set('X-Priority', '1'); //Priority 1 = High, 3 = Normal, 5 = low

	$mail->Send(); 
			echo "<script>";
			echo "alert('สมัครสมาชิกเรียบร้อยแล้วครับ!!');";
			echo "window.location ='index.php'; ";
			echo "</script>";
		} else {
			
			echo "<script>";
			echo "alert('ERROR!');";
			echo "window.location ='index.php'; ";
			echo "</script>";
		}
		
	
?>