cubase AI8 can't find Groove Agent One

Hello, all (sorry for my poor English…)

I recently bought UR242 (audio interface)
The Steinberg also get me Cubase AI8 program. so i installed it. (may be very properly)

however, when I start the cubase AI8, I couldn’t t find Groove Agent on Instrument track.
I can only find the ‘Halion’

Anyone who knows the way to solve this problem, please tell me

from south korea