How active all my UR 824 ports in Cubase 8.5.15?

hello, I’m having a problem with my UR 824, I only have 4 actives channels ; (
How I can active all other channels to use at same time??
Many thanks.
control panel cubase 2.JPG
control panel cubase.JPG

VST connections. (F11)

You have to connect the device ports to the input busses in VST connections.

thanks for all! ; =