Session problems

[aaron118]

I start a session on checklogin.php like this:

session_start();
    $data = mysql_fetch_array($result);
    $_SESSION['uid'] = $data["uid"];
    $_SESSION['username'] = $data["username"];
    $_SESSION['password'] = $data["userpass"];
    $_SESSION['firstname'] = $data["firstname"];
    $_SESSION['lastname'] = $data["lastname"]; 

It is setting them fine, I have checked. checklogin.php then redirects the user to member.php by using a header. In member.php I continue the session like this this:

session_start();
    $uid = $_SESSION['uid'];
    $username = $_SESSION['username'];
    $password = $_SESSION['password'];
    $firstname = $_SESSION['firstname'];
    $lastname = $_SESSION['lastname']; 

But now in member.php the session variables are blank. What am I doing wrong?
Thanks