Problem z header(), wywala mi błąd Opcje

[eko_moto]

Mam problem z header():

Kod

Warning: Cannot modify header information - headers already sent by (output started at /mnt/storage/users/f/o/r/forum3a/linker/index.php:52) in /mnt/storage/users/f/o/r/forum3a/linker/index.php on line 53

mam taki kod:

[PHP] pobierz, plaintext 
<?php
	$f_de=base64_decode($addr);
	$dl_n=$f_de;
 
	header("Content-Type: application/octet-stream");
	header("Content-Disposition: attachment; filename=$dl_n");
	header("Content-Length: ".filesize($dl_n));
	header("Accept-Ranges: bytes");
	header("Pragma: no-cache");
	header("Expires: 0");
	header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
	header("Content-transfer-encoding: binary");
 
	@readfile($dl_name);
 
	exit();
?>
[PHP] pobierz, plaintext 

wywala mi ten błąd oczywiście po wykonaniu skryptu

coś źle piszę