Q2W3 doesn't work on my website

Hi,

The plug-in doesn’t work on my website : http://www.unplugged-guitar.fr/hotel-california-tab-eagles/

Any idea ? I have tried to to desactivate cache extension and to intall jQuery updater (http://www.ramoonus.nl/webdesign/wordpress/jquery-updater/) but no change…

I would be glad to thank you

https://wordpress.org/plugins/q2w3-fixed-widget/