I'm sorry it didn't work out well. The batter needs to be REAL thin; much thinner than you'd make for regular cornbread. Maybe just a little thinner than pancake batter. And you need at least as much or more tomato mixture as you have cornbread batter. The original recipe, which is included in my blog post about it here, calls for equal parts milk and cornbread mix (or combo meal and flour).
FWIW, I like it better without the chile powder/cumin combo; I prefer just salt, black pepper, bacon and cheese.