Problem with cookies

[Miguel]

Hello.

I'm doing a login page in PHP and i'm with some problems with
cookies:

In a login.php, a cookie is set:
...
setcookie("logg eduser","$usern ame", time() + 900, "/");
header("Locatio n: index.php");
...


In index.php the cokkie is tested and reloaded.

if (isset($_COOKIE['loggeduser'])){
$user = $_COOKIE['loggeduser'];
setcookie("logg eduser","$user" , time() + 900, "/");
}

This procedure is performed each time a web page is loaded.

The problem is that when i run the application in enviroment test
(local server) it works fine but when the site is loaded from a real
web server the cookie isn't set.

Somebody can help me!
Thanks

Miguel