login / registratie pagina

Beste mensen,

Ik zit met een probleempje, ik heb van deze site een php login script gedownload echter bijna alles werkt ik krijg alleen een fout melding.

Ik heb al veel geprobeerd maar ik kan er niet achter komen, ik hoop dat iemand hier een oplossing voor heeft om dit script werkend te krijgen.

alvast bedankt,
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Warning: mail(): SMTP server response: 451 See http://pobox.com/~djb/docs/smtplf.html. in D:\Hosting\domains\bakkerijerkoek_nl\www\registrate.php on line 54

Fatal error: Call to undefined function: () in D:\Hosting\domains\bakkerijerkoek_nl\www\registrate.php on line 54

--------------------------------
Dit is de registratie pagina:
----------------------------------

<?php
###################################
## PHPMYLOGON: A LOGIN SYSTEM ##
## (c) 2006 Jorik Berkepas ##
## Under the GNU GPL license ##
## [email protected] ##
###################################

// Page for registrate new users

include_once("config.php");
include_once("lang/lang_".$lang.".php");
$pml_title = $site_name;
include("loginv11/htmltop.php");
include_once("loginv11/connect.php");

if(!isset($_SESSION['user_id'])) {
if(isset($_POST['submit'])) {
// Exec
// Check fields
if($_POST['user'] != "" AND $_POST['pass1'] != "" AND $_POST['pass2'] != "" AND $_POST['email'] != "") {
// Username-check
$sql = "SELECT id FROM `".$db_tbl."` WHERE name='".$_POST['user']."'";
$query = mysql_query($sql);
$count = mysql_num_rows($query);
if($count == 0) {
// E-mailcheck
if(preg_match("/^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6}$/i", $_POST['email'])) {
// Email passed check
if($_POST['pass1'] == $_POST['pass2']) {
$actcode = mt_srand((double)microtime()*100000);
while(strlen($actcode) <= 10) {
$i = chr(mt_rand (0,255));
if(eregi("^[a-z0-9]$", $i)) {
$actcode = $actcode.$i;
}
}
$md5pass = md5($_POST['pass1']);
if($activate == TRUE) {
$sql = "INSERT INTO `".$db_tbl."` (name,password,state,mail,active,actcode) VALUES ('".$_POST['user']."','".$md5pass."',0,'".$_POST['email']."',0,'".$actcode."')";
}else{
$sql = "INSERT INTO `".$db_tbl."` (name,password,state,mail,active,actcode) VALUES ('".$_POST['user']."','".$md5pass."',0,'".$_POST['email']."',1,'')";
}
$query = mysql_query($sql);
if($query == TRUE) {
$sql = "SELECT id FROM `".$db_tbl."` WHERE name='".$_POST['user']."'";
$query = mysql_query($sql);
$rij = mysql_fetch_object($query);
$dbid = htmlspecialchars($rij->id);
$bericht = $reg_mail;
$bericht .= "CONFIRM: ".$site_url."activate.php?id=".$dbid."&code=".$actcode."&registration=true \n\n";
$bericht .= "Username/Gebruikersnaam: ".$_POST['user']."\n";
$bericht .= "Password/Wachtwoord: ".$_POST['pass1']."\n";
$mail = mail($_POST['email'],"Registratie ".$sitenaam,$bericht,"From: ".$sitenaam." <".$sitemail.">");$mysql_query($sql) OR trigger_error(mysql_error);
if($activate == TRUE) {
if($mail == TRUE) {
echo $reg_truemail;
}else{
echo $error;
}
}else{
echo $reg_nomail;
}
}else{
echo $error;
}
}else{
echo $reg_pascheck;
}
}else{
echo $reg_mailcheck;
}
}else{
echo $reg_userexists;
}
}else{
echo $reg_field;
}
}else{
// Form
?>
<form method="post" action="registrate.php">
<table>
<tr>
<td><label for="user"><?= $reg_username ?>:</label></td><td><input id="user" type="text" name="user" maxlength="50" /></td>
</tr>
<tr>
<td><label for="pass1"><?= $reg_password ?>:</label></td><td><input id="pass1" type="password" name="pass1" /></td>
</tr>
<tr>
<td><label for="pass2"><?= $reg_repeat ?>:</label></td><td><input id="pass2" type="password" name="pass2" /></td>
</tr>
<tr>
<td><label for="mail"><?= $reg_mail ?>:</label></td><td><input id="mail" type="text" name="email" maxlength="100" /></td>
</tr>
<tr>
<td></td><td><input type="submit" name="submit" value="<?= $reg_reg ?>" /></td>
</tr>
</table>
</form>
<?
if($activate == TRUE) {
echo "<small>".$reg_mailnote."</small>";
}
}
}else{
echo $reg_loginerror;
}

include("htmlbottom.php");
?>