Using Yamaha MOX6 with Cubase AI 5 problems

Just thought I’d post my problem in this part of the forum as well.
Each time I try to use my MOX6 with Cubase, it has a box come up
that says in red “unmapped”. Is there something I need to download
or something I have to do in Cubase like change some settings? I’m quite
new to using Cubase…so any help?