2.5 Smoke Problems

I’ve been trying to render some smoke, however, when I put all the settings in, then bake, there is no feedback.
Playing back the animation lags. My screen lags too. The smoke just appears flat on the plane that is the flow. Changing to a different frame leaves the smoke the same. It doesn’t change. When I remove the plane, the smoke stays. The smoke has some sort of ghostish property. What could be causing this?