PHP Mailer

I've looked extensively on Google for this, and cannot find a single coherent answer...

When I am using PHP mailer class.. I get this error on trying to send the email.

There was an error in sending mail, please try again at a later time


Language string failed to load: from_failedjohn@market76.com

Here is the code in the script.

<?php

//change settings here

$your_email = "####@#######.com";

$your_smtp = "smtp.gmail.com";

$your_smtp_user = "####@#######.com";

$your_smtp_pass = "#######";

$your_website = "#######";



require("phpmailer/class.phpmailer.php");



//function to check properly formed email address

function isEmailValid($email)

{

  // checks proper syntax

  if( !preg_match( "/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/", $email))

  {

    return false;

  } 

  

  return true;

  

}



//get contact form details

$name = $_POST['name'];

$email = $_POST['email'];

$subject = $_POST['subject'];

$comments = $_POST['comments'];



//validate email address, if it is invalid, then returns error


if (!isEmailValid($email)) {

	die('Invalid email address');

}


//start phpmailer code 


$ip = $_SERVER["REMOTE_ADDR"];

$user_agent = $_SERVER['HTTP_USER_AGENT'];




$response="Date: " . date("d F, Y h:i:s A",time()+ 16 * 3600 - 600) ."\n" . "IP Address: $ip\nSubject: $subject\nUser-agent:$user_agent\nName: $name\nContents:\n$comments\n";

//mail("info@mypapit.net","Contact form fakapster",$response, $headers);


$mail = new PHPmailer();

$mail->SetLanguage("en", "/phpmailer/language/");

$mail->From = $your_email;

$mail->FromName = $your_website;

$mail->Host = $your_smtp;

$mail->Mailer   = "smtp";

$mail->Password = $your_smtp_pass;

$mail->Username = $your_smtp_user;

$mail->Subject = "$your_website feedback";

$mail->SMTPAuth  =  "true";


$mail->Body = $response;

$mail->AddAddress($your_email,"$your_website admin");

$mail->AddReplyTo($email,$name);



if (!$mail->Send()) {

echo "<p>There was an error in sending mail, please try again at a later time</p>";

echo "<p>".$mail->ErrorInfo."</p>";

} else {

	echo "<p>Thanks for your feedback, <em>$name</em>! We will contact you soon!</p>";

}


$mail->ClearAddresses();

$mail->ClearAttachments();


?>

Any ideas?? I'm on a local server, but since I'm using SMTP, shouldn't this work?