I have finished the Tutorial for Character Controller with the additions recommended here and in one other place. I can walk, run, jump, and everything! BUT (there is always a but) I can't walk up the ramps/stairs, and I am not walking on the floor. I am just floating in mid air. It is very weird. I can't find the problem. I have the gravity set, I have the mass set, I have collisions set, I don't know what else to set. Ideas?