Sabertooth 2x12 with 2 d/c motors

HI! I am just learning arduino. I have figured out to how program 2 small d/c motors with a motor driver (osepp MTD-01) using an adafruit mini analog joystick with 10K poteniomters. BUT, I wanted to "grow" the project where I can use the joystick to power a kids ride on toy. Since my motor controller is only rated for 3Amps, I bought a sabertooth 2x12, as it can handle my max amps. My goal was to use the mini joystick, a 12 volt battery,and 2 motors. So the only thing I was changing was the motor controller.

I have had problems from the start- even when I download the software from Dimension Engineering with example programs, nothing seems to work. I suspect I am doing something wrong with the DIP switches. When I do the suggested 1,3,5,6 on, the second motor runs regardless of what I program. Does anyone know the correct DIP settings, or a VERY easy step by step to get this going? I need any help in layman's terms, as I do not have a strong electronics background......