Was ist hier falsch?

<?
header("Content-type: image/png");
require "../SampQueryAPI.php";
$server = new SampQueryAPI(SLIDELOGIN_SAMP_IP, SLIDELOGIN_SAMP_PORT);
if($server->isOnline())
{
    $aInformation = $server->getInfo();
    $text = "Test";
}else{
    $text = "ERROR";
    $black = imagecolorallocate($img,255,0,0);
}
$img = imagecreatefrompng("online.png");//bei png
$black = imagecolorallocate($img,255,255,255);
$text = "Test";
$ip = getenv("REMOTE_ADDR");
imagettftext($img, 10, 0, 10, 140, $black, "fonts/04b-31.ttf", "IP:". $ip);//magettftext ( resource $im , int $size , int $angle , int $x , int $y , int $col , string $fontfile , string $text )
imagepng($img);//bei png
?>