uhh, just so you know, op2 can't handle maps that big. They can't be wider than 512 tiles. It's best to make world maps the same size as other world maps. Also, you might want to take some time to put detail into your next map, this one kinda looks... unfinished.
Edit: you didn't fill in the cell type layer either. Units will be able to go on any tile the way it is now.