Have you followed the steps in the Demo? (Start with 'Getting Started' and at the end of the topic, I've added the next thing you should read).
Understanding how Grids work is very important. Knowing myself, everyone is very eager to start writing stuff, but I can't emphasize enough the importance of grids. I'm planning to write an ABMAbstractDesigner that will make this less important in the future, but as for now, you REALLY need to understand that part very good.