Bravo List - terminate users session

I want to terminate all users session after a perion of time, let's say 24h
I have this in bittorrent.php

Code:

function logincookie($id, $passhash, $updatedb = 1, $expires = 0x7fffffff)

{

        setcookie("uid", $id, $expires, "/");

        setcookie("pass", $passhash, $expires, "/");



  if ($updatedb)

          mysql_query("UPDATE users SET last_login = NOW() WHERE id = $id");

}

Tried to change $expires like this:

Code:

function logincookie($id, $passhash, $updatedb = 1, $expires = 0x15180)

{

        setcookie("uid", $id, $expires, "/");

        setcookie("pass", $passhash, $expires, "/");



  if ($updatedb)

          mysql_query("UPDATE users SET last_login = NOW() WHERE id = $id");

}

But it's not working. If i put any other value instead of 0x7fffffff , it will fail. Instead of redirecting me to my account, it redirects me again to login.php .
It's working only with 0x7fffffff value.
Maybe is another function to terminate all users session after a specific period?