CPANEL Mail Script - what am I doing wrong?

Hi,

The below script works well EXCEPT for it won't check if the email address has already been registered. Could someone take a look and let me know what I'm doing wrong? If I try to register an email that's already been registered, it still shows a success message. Thanks in advance for any help:

Code:

<?
/***************************************************************************
 *                             add_email.php
 *                            -------------------
 *   begin                : Thursday, 12 April, 2007
 *   owner                : AtomicPHP.com - Dave
 *   email                : dave@atomicphp.com
 *
 *
 ***************************************************************************/
/***************************************************************************
 *
 *   This program is a free script; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/
ob_start(); 
?>
<?php

include ("includes/config.php");

// Check that all fields contain a value, if not, return an error.
$emailcheck = $_POST["email"]; if (preg_match('/[\'\/~`\!@#\$%\^&\*\(\)_\-\+=\{\}\[\]\|;:"\<\>,\.\?\\\]/', $emailcheck)) {echo "<div class=style8>Please go back and remove the special characters from your name.</div>";}
elseif (!$_POST['password'] | !$_POST['confirm'] | !$_POST['email']) {
		echo "<div class=style8>Please go back and fill in all of the required fields.</div>";
}
elseif ($_POST['password'] != $_POST['confirm']) {
		echo "<div class=style8>The passwords you entered do not match</div>";
}else{
	function MakeSafe($string){
		$user  =  strtolower($string);
		$user  =  stripslashes($string);
		$user  =  trim($string);
		$user  =  strip_tags($string);
		return  $string;
	}
	$_POST['fname'] = MakeSafe($_POST['fname']);
	$_POST['lname'] = MakeSafe($_POST['lname']);
	$_POST['email'] = MakeSafe($_POST['email']);
	$_POST['password2'] = MakeSafe($_POST['password2']);
	$_POST['altmail'] = MakeSafe($_POST['altmail']);
	$domain_name = MakeSafe($domain_name);
	$cpanel = curl_init();
	$addr = "http://MYIPADDRESS:2082/frontend/$skin/mail/doaddpop.html";
	$string_values = "email=$_POST[email]&domain=$domain_name&password=$_POST[confirm]&quota=$email_quota";
	curl_setopt($cpanel, CURLOPT_URL, $addr);
	curl_setopt($cpanel, CURLOPT_TIMEOUT, 10);
	curl_setopt($cpanel, CURLOPT_POST, 1);
	curl_setopt($cpanel, CURLOPT_USERPWD, "$user:$pass");
	curl_setopt($cpanel, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($cpanel, CURLOPT_POSTFIELDS, $string_values);
	$cpanel_result = curl_exec($cpanel);
	curl_close ($cpanel);
	
	$start_point = strpos($cpanel_result, 'there'); // Seek Result
	$end_point = strpos($cpanel_result, 'account.'); 
	$info = substr($cpanel_result, $start_point, $end_point+8-$start_point);
	if (preg_match ('/problem/i', "$info")) {
		print "<br><b><div class=style8>Sorry that account already exists.</b><br><br><a href=javascript:history.go(-1)>Back</a></div>";
	 }elseif(preg_match ('/You must specify/i', "$info")) {
		echo "
		<br>
		<b><div class=style8>You must specify a password.</b>
		<br />
		<br />
		<a href=javascript:history.go(-1)>Back</a></div>";
	}else {
		echo "<div class=style8>Account Successfully Created</div>";
		echo "<br>
		<div class=style8>The email account $_POST[email]@$domain_name has now been created, with a quota of <b>$email_quota mb</b>.
		<br />
		<b>Username:</b> $_POST[email]@$domain_name <br/>
		<b>Password:</b> $_POST[confirm]<br /><br />
		Please use the following link to login to your webmail:<br/> <a href=http://webmail.blogsfromthefield.org/>Webmail login</a><br />";
	}
}
?>