Send mail using php

[ghjk]

I want to send mail when user click "forgot password " button. This is my code and It doesn't send a mail. Could somebody tell me what is wrong with my code?
[PHP]

require_once "Mail.php";

$from = "test Sender <__MUNGED__>";
$to = "test Recipient <__MUNGED__>";
$subject = "Hi!";
$body = "Hi,\n\nHow are you?";

$host = "192.248.xxx.xxx";
$username = "nadeeka";
$password = "__MUNGED__";

$headers = array ('From' => $from,
'To' => $to,
'Subject' => $subject);
$smtp = Mail::factory('smtp',
array ('host' => $host,
'auth' => true,
'username' => $username,
'password' => $password));

$mail = $smtp->send($to, $headers, $body);

if (PEAR::isError($mail)) {
echo("<p>" . $mail->getMessage() . "</p>");
} else {
echo("<p>Message successfully sent!</p>");
}
?>
[/PHP]

[Atli]

Hi.

Are you getting any errors?
If not, try turning on the debug messages and see if that helps any.

Alternatively, you could try using one of the mailer classes, like PHPMailer.