Plugin not scrolling

I have installed the plugin, read through the support, forums and google’d around but still can’t see to make it work. The plugin is supposed to be sticking the last 2 widgets in the sidebar.

http://solpurpose.digitalempathydesign.com/2014/11/03/tsu-co-the-new-social-network-that-pays-you-for-your-content/

https://ww.wp.xz.cn/plugins/q2w3-fixed-widget/