Problem with sending 401 Unauthorized headers

[DeepBlerg]

Hi,

I am trying to invoke the username/password dialog with the following code:

<?
if ( ( !isset( $PHP_AUTH_USER )) || (!isset($PHP_AUTH_PW))
|| ( $PHP_AUTH_USER != 'admin' ) || ( $PHP_AUTH_PW != 'test' ) ) {
header( '

http://WWW-Authenticate:

Basic realm=&quot;Admin&quot;' );
header( 'HTTP/1.0 401 Unauthorized' );
echo 'You are not authorized to access this area.';
exit;
} else {

// content

}
?>

When I run this i get a 500 Internal Server Error, I have tried different ways that work on other machines but get the same error. I think the problem is in the php.ini file, does anyone know where?

Thanks.