Quiz

I still have this bug in Moodle v1.9.13.
When user clicks to one of the bottom buttons on /mod/quiz/attempt.php page,
the user is forced to login again, losing all the answers ticked.

Browser is Firefox v3.6.27, Apache2 webserver, Debian OS.
Tried to set PHP's gc_maxlifetime (in Apache config) to 4 hour (14400), but still the users are logged out after about half hour.

<Directory /domains/moodle/moodle_v1_9_13/htdocs>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride None
    Order allow,deny
    allow from all

    php_value register_globals Off
    
    # Fix for Moodle quiz timeout
    php_value session.gc_maxlifetime  14400
</Directory>

Moodle's session timeout is set to 4 hour.

 
Any idea?