I have the following plugin: http://wordpress.org/support/plugin/wp-session-manager
I cannot work out how to use the session variables in WordPress. From what I understand by reading, this is how it should be used:
I have the following on page one (page 1):
$wp_session['loggedIn'] = 15;
$wp_session = WP_Session::get_instance();
Make sure you add
$wp_session = WP_Session::get_instance(); before you try to echo the variable on page 2.