Sending Mail via PEAR

Hi,

I just developed a custom theme and installed WordPress at the root of my site.

Before this I had a collection of static html pages. One of the features I had was a jQuery plugin which opens a ‘contact me’ form to let visitors send me an email directly from my site. It used a simple PHP file that used the PEAR extension to send the email to my hotmail. It was simple but it worked well and I got the emails.

After installing wordpress and my custom theme however the emailer no longer works. Even though I have the same PHP file, in the same locations on my server, the emails are not being sent to me.

This is the PHP file:

<?php

	require_once "Mail.php";

	$to = "my_email_address";
	$from = $_POST["from"];
	$subject = $_POST["subject"];
	$body = $_POST["message"] . "\n\n" . $_POST["pageURL"];	

	$host = "localhost";
	$username = "my_correct_verified_username";
	$password = "my_correct_verified_password";

	$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($mail)) {
  		echo($mail->getMessage());
 	} else {
  		echo("Message successfully sent!");
 	}

?>

Any idea why this would stop working after intalling WP? Is it to do with the script not being able to find Mail.php in the require_once line?