Registrierungs Code wird nicht angezeigt Warum?

<?php
$_language->read_module('register');


eval("\$title_register = \"".gettemplate("title_register")."\";");
echo $title_register;
$show = true;
if(isset($_POST['save'])) {


	//register_globals = off


	$username = mb_substr(trim($_POST['username']), 0, 30);
	$nickname = htmlspecialchars(mb_substr(trim($_POST['nickname']), 0, 30));
	$pwd1 = $_POST['pwd1'];
	$pwd2 = $_POST['pwd2'];
	$mail = $_POST['mail'];
	$CAPCLASS = new Captcha;

	$error = array();

  // check nickname
	if(!(mb_strlen(trim($nickname)))) $error[]=$_language->module['enter_nickname'];

  // check nickname inuse
	$ergebnis = safe_query("SELECT * FROM ".PREFIX."user WHERE nickname = '$nickname' ");
	$num = mysql_num_rows($ergebnis);
	if($num) $error[]=$_language->module['nickname_inuse'];

  // check username
  	if(!(mb_strlen(trim($username)))) $error[]=$_language->module['enter_username'];
	elseif(mb_strlen(trim($username)) > 30 ) $error[]=$_language->module['username_toolong'];

  // check username inuse
	$ergebnis = safe_query("SELECT * FROM ".PREFIX."user WHERE username = '$username' ");
	$num = mysql_num_rows($ergebnis);
	if($num) $error[]=$_language->module['username_inuse'];

  // check passwort
	if($pwd1 == $pwd2) {
		if(!(mb_strlen(trim($pwd1)))) $error[]=$_language->module['enter_password'];
	}
	else $error[]=$_language->module['repeat_invalid'];

  // check e-mail
	if(!validate_email($mail)) $error[]=$_language->module['invalid_mail'];

  // check e-mail inuse
	$ergebnis = safe_query("SELECT userID FROM ".PREFIX."user WHERE email = '$mail' ");
	$num = mysql_num_rows($ergebnis);
	if($num) $error[]=$_language->module['mail_inuse'];

  // check captcha
  	if(!$CAPCLASS->check_captcha($_POST['captcha'], $_POST['captcha_hash'])) $error[]=$_language->module['wrong_securitycode'];

  	if(count($error)) {
		$list = implode('<br />• ', $error);
		$showerror = '<div class="errorbox">
  		<b>'.$_language->module['errors_there'].':</b><br /><br />
  		• '.$list.'
		</div>';
	}
	else {
		// insert in db
		$md5pwd = md5(stripslashes($pwd1));
		$registerdate=time();
		$activationkey = createkey(20);
		$activationlink='http://'.$hp_url.'/index.php?site=register&key='.$activationkey;


		safe_query("INSERT INTO `".PREFIX."user` (`registerdate`, `lastlogin`, `username`, `password`, `nickname`, `email`, `newsletter`, `activated`) VALUES ('$registerdate', '$registerdate', '$username', '$md5pwd', '$nickname', '$mail', '1', '".$activationkey."')");


		$insertid = mysql_insert_id();


		// insert in user_groups
		safe_query("INSERT INTO ".PREFIX."user_groups ( userID ) values('$insertid' )");


		// mail to user
		$ToEmail = $mail;
		$ToName = $username;
		$header =  str_replace(Array('%username%', '%password%', '%activationlink%', '%pagetitle%', '%homepage_url%'), Array(stripslashes($username), stripslashes($pwd1), stripslashes($activationlink), $hp_title, $hp_url), $_language->module['mail_subject']);
		$Message = str_replace(Array('%username%', '%password%', '%activationlink%', '%pagetitle%', '%homepage_url%'), Array(stripslashes($username), stripslashes($pwd1), stripslashes($activationlink), $hp_title, $hp_url), $_language->module['mail_text']);


		if(mail($ToEmail,$header, $Message, "From:".$admin_email."\nContent-type: text/plain; charset=utf-8\n")){
			redirect("index.php",$_language->module['register_successful'],3);
			$show = false;
		}
		else{
			redirect("index.php?site=register",$_language->module['mail_failed'],3);
			$show = false;
		}
	}
}
if(isset($_GET['key'])) {


	safe_query("UPDATE `".PREFIX."user` SET activated='1' WHERE activated='".$_GET['key']."'");
	if(mysql_affected_rows()) redirect('index.php?site=login',$_language->module['activation_successful'],3);
	else redirect('index.php?site=login',$_language->module['wrong_activationkey'],3);


}
elseif(isset($_GET['mailkey'])) {
  if(mb_strlen(trim($_GET['mailkey']))==32){
		safe_query("UPDATE `".PREFIX."user` SET email_activate='1', email=email_change, email_change='' WHERE email_activate='".$_GET['mailkey']."'");
		if(mysql_affected_rows()) redirect('index.php?site=login',$_language->module['mail_activation_successful'],3);
		else redirect('index.php?site=login',$_language->module['wrong_activationkey'],3);
  }
}
else {
	if($show == true){
		$bg1=BG_1;
		$bg2=BG_2;
		$bg3=BG_3;
		$bg4=BG_4;

		$CAPCLASS = new Captcha;
		$captcha = $CAPCLASS->create_captcha();
		$hash = $CAPCLASS->get_hash();
		$CAPCLASS->clear_oldcaptcha();

		if(!isset($showerror)) $showerror='';
		if(isset($_POST['nickname'])) $nickname=getforminput($_POST['nickname']);
		else $nickname='';
		if(isset($_POST['username'])) $username=getforminput($_POST['username']);
		else $username='';
		if(isset($_POST['pwd1'])) $pwd1=getforminput($_POST['pwd1']);
		else $pwd1='';
		if(isset($_POST['pwd2'])) $pwd2=getforminput($_POST['pwd2']);
		else $pwd2='';
		if(isset($_POST['mail'])) $mail=getforminput($_POST['mail']);
		else $mail='';

		eval("\$register = \"".gettemplate("register")."\";");
		echo $register;
	}
}


?>