Problema al bajar imagen

[PHPeros]

Código PHP:

<?php
$file = "http://www.habbo.".$_GET['hotel']."/habbo-imaging/avatarimage?user=".$_GET['user']."&direction=".$_GET['direction']."&head_direction=".$_GET['head']."&gesture=".$_GET['gesture']."&action=".$_GET['action']."&size=".$_GET['size'];
header("Content-disposition: attachment; filename=avatar_".$_GET['user'].".png");
header("Content-type: image/png");
echo file_get_contents($file);
?>