List 2 Categories

hi i’m, using this module
I need to list only items that are selected in two categories
Example:

Category 1: PS3.
Category 2: Acessory.

I need to list the items that are accessories and PS3. At the moment he is listing all items of two categories. Listing items and accessories items ps3, I need a filter for that

http://ww.wp.xz.cn/extend/plugins/multiple-category-selection-widget/