I am using Fixer theme on the following site.

Hi,

I am using Fixer theme on the following site.
http://tanzeem.tahreek.net/

I want to use Layer Slider on the top. I tried to do it by inserting widget and then selecting Layer Slider WP. when i insert it, it says "Invalid Shortcode". How can i insert a full width layerslider?

If i create a post with upfront, How do i add a featured image?

There is a "Like Box" in the upfront. is there any widget for twitter? How my site users can add their twitter feed without any difficulty?

Thanks