Float ads plugin

Hello,

I'm using plugin this plugin https://wordpress.org/plugins/float-left-right-advertising/ to make my ads float on left and right when user scroll page up/down.

As you see, now my ads can scroll well but i need to make it fixed at bottom of page (i can set the margin top but i'm really want it fixed). You can take a look demo at this page, the ads fixed when you scroll page: http://worldcup.vnexpress.net/

My site http://www.export2global.net/testnd/

I'm also grant access for you in case you want to take a look.

Thanks,
Tuan.