CustomPress custom type not showing in category listing


I have created a custom type using CustomPress and I created a category entry in the main menu of my site.

I then created a new article of the custom type and assigned it to the category in the menu.

When clicked in the category, the listing only shows those articles belonging to the category who are based on the original default wordpress Post type not the ones based on my new custom type.

How can I make them appear?