Created categories not appearing in the drop down for a HR Helpdesk Request

I have created some new categories, assigned them Business Units, set them to active and they have category code and name. When I open up the new Service Request workspace, I have all of the other Categories in my site available except my new ones. I am sure I am missing something very obvious but I have followed the instructions on the Implementation guide.

Any assistance gladly received!

Thanks,

Paul