Drop down menu width not correct

[Blackbeltpatches]

I've installed the CSS Horizontal Drop Down Menu module on:

http://blackbeltpatches.com

The drop down elements of the navigation (new products, all products etc) are too narrow - I want them to be the same width as the parent categories (home etc).

I've searched for the relevant file to edit with no luck.

Can anyone assist?

[first trading]

In the stylesheet_header_menu.css find the following code:

div#dropMenu ul ul li {border-bottom: 1px solid #CCC; width: 100%;z-index:10000;}

div#dropMenu ul.level7 li.submenu:hover ul.level8 {position: absolute; width: 100%;display:block;z-index:10000;}
div#dropMenu ul.level2 {background:#4f4f4f;z-index:10000;position:absolute;left:0;width: 100%;}

They are all in the bottom block of code. As above make sure that all width is set to 100%.