senha aleatória

Oi pessoal,estou com um probleminha com uma senha aleatória, e queria saber se alguém poderia ver no que estou errando ao colocar a função de criar a senha aleatória no meu código

Meu código é esse:

<?php
defined('_VALID') or die('Restricted Access!');

$user = array('username' => '', 'email' => '', 'emailverified' => 'no', 'account_status' => 'Active',

 'fname' => '', 'lname' => '', 'gender' => 'Male');
if ( isset($_POST['add_user']) ) {
require $config['BASE_DIR']. '/classes/filter.class.php';
require $config['BASE_DIR']. '/classes/validation.class.php';

 $filter = new VFilter();
 $valid = new VValidation();
$username = $filter->get('username');
 $email = $filter->get('email');
 $fname = $filter->get('fname');
 $lname = $filter->get('lname');
 $gender = $filter->get('gender');
 $relation = $filter->get('relation');
$account_status = $filter->get('account_status');
$plano = $filter->get('plano');

if ( $username == '' ) {
	$errors[] = 'Username field cannot be blank!';

} elseif ( !$valid->username($username) ) {
$errors[] = 'Username field is not a valid username!';
} elseif ( $valid->usernameExists($username) ) {
$errors[] = 'Username is already used by another user!';
} else {

	$user['username'] = $username;
}

if ( $email == '' ) {
 $errors[] = 'Email field cannot be blank!';
 } elseif ( !$valid->email($email) ) {
 $errors[] = 'Email is not a valid email address!';
 } elseif ( $valid->emailExists($email, $UID) ) {
 $errors[] = 'Email is already used by another user!';
 } else {
	$user['email'] = $email;
}

if ( !$errors ) {
	$user['fname'] = $fname;
	$user['lname'] = $lname;
	$user['gender'] = $gender;
	$user['account_status']	= $account_status;

 //GERA UM PASSWORD ALEATÓRIO
 $password = $conn->createsPassword('awsxeky','0123456789',4);

	$sql	= "INSERT INTO signup SET username = '" .mysql_real_escape_string($username). "', email = '" .mysql_real_escape_string($email). "',
 pwd = '" .md5($password). "', fname = '" .mysql_real_escape_string($fname). "',
 lname = '" .mysql_real_escape_string($lname). "', gender = '" .mysql_real_escape_string($gender). "',
 account_status = '" .mysql_real_escape_string($account_status). "', plano = '" .mysql_real_escape_string($plano). "'";
	$conn->execute($sql);
	$messages[] = 'User was successfully added!';
}
}

$smarty->assign('user', $user);
?>

Estou penando aqui com isso o resto esta cadastrando normalmente...