Defining header response not working in hiawatha and php -

i have local server , remote server. on local server i'm trying works, remote server hiawatha doesn't.

i'm trying set not found header , respond login page. i'm using following code that

if($e === "errorsessionexpired")         {              header("http/1.0 404 not found");             $output = $this->smarty->fetch("login.tpl");             echo $output;             exit();         } 

as said works fine on developing machine, uses embedded server of phped

try:

header("status: 404 not found");