So it worked perfectly so I made a 3D aplication for that, and it worked the mouse moved along the maze by it self, but when I tried to set a camara in front of the mouse, the mouse doesnt rotate, only move, just for changing the camera, that have nothing to do with the object called "Rat".
What do you mean exactly? Does it run into the walls of the maze instead? I can't see a relationship between your object (mouse/airplane/whatever) and the camera unless you are doing something strange in your attempt to allow multiple cameras in one world but different applets. Maybe a code snippet world help that shows how you are setting up the camera and moving your mouse and the camera.
Another problem but this is not strange, when I move the rat, The mobement is not continuous. it moves like a teletransportation and not like a movement like walking, is just about moving with a slow speed?
If you do a translation like (10,0,0), it will of course jump from its current position to current.x+10. If you want to happen this smooth, you have to interpolate it yourself (for example by moving one unit per frame instead of 10 until you've reached your destination).