The page isn't redirecting properly

Hi Experts,

I've just uploaded a PHP code that works on my localhost, but on the server FF gives me:

The page isn't redirecting properly

Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

    This problem can sometimes be caused by disabling or refusing to accept cookies.

IE just hangs.

The code behind this is

  $user = $_POST['txtUser'];
        $password = $_POST['txtPassword'];
        $login_status = Login::verify_login($user, $password);
    
        if ($login_status == 'admin') {
            header('Location: index.php?action=list');
        } 
        else if ($login_status == 'rs') {
            header('Location: ../dispatch');
        } 
        else {
            header('Location: ../?type=err&msg=User Id / Password combination not found.');
        }
      

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What could it be?  Again, under localhost, no issues..