Line below Advanced Layer slider

I have created a website and on the homepage have included the “Advanced Layer Slider”. Below it is a colour section with a background image and some text. However, I noticed that there is a grey line separating the slides and the section below. This does not seem to occur on other pages, which don’t have the advanced layer slider.

This is the website I’m talking about

http://www.lightanddarkdesigns.com.au/

I tried dragging the “Advanced Layer Slider” within the colour section, however, I am unable to do that. Although I noticed that I can place the “Easy Slider” within the colour section.

Can you please let me know how I can remove the grey line which separates the slider and the rest of the page.

I have set the main content to have black background.

Also the slider background has been set to black

But this does not seem to make any difference.

Many thanks

Ivana