How to save session on Wii U?

Question

I have had problems with running a PHP program I made on Wii U... it seems the session does not save from page to page (as if I never run session_start(); ). I boiled it down to this short script:

<?php
session_start();
if(!isset($_SESSION['count']))
{
    $_SESSION['count']=0;
}
var_dump($_SESSION['count']);
$_SESSION['count']++;

Which should echo out int(0), next page load int(1), next page load int(2), etc. However, on Wii U Internet Browser it only shows int(0).

I have found no way to save to a session on the Wii U Internet Browser. I know it is possible, because logins are saved from page to page. Is there a configuration issue I'm missing or is it just a problem with my Wii U?