Whats Gone Wrong?

Hey Guys,
I'm learning the User Authentication and I have a very simple script,
<?php

header("WWW-Authenticate: Basic realm="Private");
header("HTTP/1.0 401 Unauthorized");
exit;

And I get this message:

Parse error: parse error in /home/gloucester/public_html/php/login2.php on line 3

What am I doing wrong? Please Help. Thanks.

LEE

backslashes:

header("WWW-Authenticate: Basic realm="Private");

should be

header("WWW-Authenticate: Basic realm=\"Private\"");

I've tried what you suggested and get the same response. Is my code correct?

<?php

header("WWW-Authenticate: Basic realm=\"Private\"");
header('HTTP/1.0 401 Unauthorized');
exit;

This is all I have in my .php file. Do I need more?

Please help

LEE