In follow up to this problem, I am having an issue. Look over that question, and the correct .blend file is included there. I replicated the logic there to have everything the same. An empty is supposed to be in the center of my screen when it collides with certain objects. For my .blend, when I move my mouse over an object it is supposed to track to, it tracks to it. There is an issue though: if I keep my mouse in that object and keep moving, the empty will not track again. In other words, the first time I look over an object, the empty will track there and will not continue tracking unless I go to another object. If you look at the .blend in the other question, and add a cube ontop of the empty that is a child of the empty just to see where the empty is, everything is flawless. If you look over an object, it tracks there. If you keep looking around within the object, it keeps updating. I tried to explain this the best I can, and I hope you understand. How can I have it constantly updating its position rather than every time I look over a new object? Thanks!
EDIT: Just to avoid confusion and the fact that my other question's .blend is old, both .blends [good and bad] will be below, and you can see for youselves:
The incorrectly working .blend.
The working .blend.
Take a look at both .blends, they both generally have the same concept. If you still do not understand, the best way to understand is to do the following: download both .blends, and move your mouse over a wall or a cube in the game; keep your mouse on the object and move around still within the object. For the working .blend, drag your mouse across the floor and notice how it updates quickly. For the incorrectly working one, drag your mouse across a cube and notice how it tracks once and only once unless you go over another object.