Meta Slider in Header

Hi Tom,

For a client i want to add a Meta Slider just under the header on the homepage.
Off course i use the add-on "Page Header"

In the content section i put the sliders shortcode and the container type i set on fluid.
I hoped that the slider would stretch out at full-width. But it goes to its maximum size as set in the lay-out setting (for example 1200 pix).

The funny part is when i give the page header a background color it goed full width.
(with the sliders width 1200 px)

The slider is set at 100% wide-out by the way. In other themes it does strecth out full width.
But i really would like to be able to do that in your theme as well.

Hope it is possible. Thanks a lot.

Kind regards, Joris