Using MPD18 with Cubase / Groove Agent 4 / Sync

I have Cubase 7.5 and have recently purchased groove agent 4. I have a simple MPD-18 Controller in which I’m trying to synchronize it to work with groove agent4. I guess the problem that I’m having is I don’t fully understand the process of programming groove agent 4’s pads to work directly In Sync with my MPD18…
I’ve searched videos and couldn’t find an direct answer. Could someone please help me out in this area, I’m not very savvy working with this controller set up.
Could someone please walk me through this process.
Thank you God bless, Rev Green