Email not sent via google smtp

I am using the following PHP code to send an email with a predefined mail attachment.

<?php

require_once('class.phpmailer.php');

$mail             = new PHPMailer();
$body             = $_POST['message'];
$mail->IsSMTP();
$mail->SMTPAuth   = true;
$mail->Host       = "smtp.gmail.com";
$mail->Port       = 465;
$mail->Username   = "dimal.chandrasiri@gmail.com";
$mail->Password   = "****";
$mail->SMTPSecure = 'tls';
$mail->SetFrom('dimal.chandrasiri@gmail.com', 'Your name');
$mail->AddReplyTo("dimal.chandrasiri@gmail.com","Your name");
$mail->Subject    = "Abstract submission for" .$_POST['fname'];
$mail->AltBody    = $_POST['message'];

if (isset($_FILES['uploaded_file']) && $_FILES['uploaded_file']['error'] == UPLOAD_ERR_OK){
    $mail->AddAttachment($_FILES['file']['tmp_name'],$_FILES['file']['name']);
}

$mail->MsgHTML($body);
$address = 'dimal.chandrasiri@gmail.com';
$mail->AddAddress($address, $name);

if($mail->Send()) {
      echo 'done';
} else {
      echo 'error';
}

?>

      

        
        
        
      

    

The passwords and other smtp details are correct, but I cannot send mail. What am I doing wrong here? I am using the following html form to post data.

<form id="main-contact-form" class="abstract-form" name="contact-form" method="post" action="/script/submit.php">
<div class="row-fluid">
    <div class="span5">
        <label>First Name</label>
        <input type="text" name='fname' class="input-block-level" required="required" placeholder="Your First Name">
        <label>Last Name</label>
        <input type="text" name='lname' class="input-block-level" required="required" placeholder="Your Last Name">
        <label>Email Address</label>
        <input type="text" name='email' class="input-block-level" required="required" placeholder="Your email address">
        <label>File</label>
        <input type="file" name='file' class="input-block-level" required="required" placeholder="Your Abstract File">
    </div>
    <div class="span7">
        <label>Message</label>
        <textarea name="message" id="message" required="required" class="input-block-level" rows="8"></textarea>
    </div>
</div>
<button type="submit" class="btn btn-primary btn-large pull-right">Send Message</button>
<p> </p>    
</form>

      

        
        
        
      

    

I am getting the following error when I repeat the error information.

The following From address failed: dimal.chandrasiri@gmail.com : Called Mail() without being connected