Moog Slim Phatty editor in Cubase 8.5

I can not use the editor in Cubase 8.5 (win 7 ) .
The slim phatty is connected to the PC with USB cable, and its output is connected to Line 3 input of my sound card Apollo quad firewire .

You can well explain how to set up everything that you need to make it work ?
thank you so much