Instead of the result, could you show us a shot of the original frame and tell us what you're trying to accomplish?
Keylight is working properly, your technique is just not good. You need to study some in-depth tutorials. Simply type keylight in the search help field at the top right corner of the app and go through some training materials.
Rick, as you can see from the post above, I have already processed several shots. As I stated above,
the simple choker function will not work properly recently---most times it will not work at all. Sometimes
it works when I do the first adjustment, but will not work after that. By not working, I mean I make an adjustment
to the choker setting, and nothing happens at all.
Think about it as TWO shots: the left side and the right side. The left side needs NO keylight. The right side does. You composite the two by animating a mask when necessary.
The green screen itself will be problematic: the green is not very saturated, and it contains lots of light and dark spots. It almost looks like someone hung white towels & sheets on a wall and shined a green light on it. Doing something like that greatly increases the time spent in post.
Color correcting the keylight part of the composite to match the non-keylight part of the composite could be a real pain.
Did you maybe set the output (View parameter) of Keylight to "Combined Matte" or "Status" or so instead of "Final Result"?
Note that the Simple Choker will only work on the alpha channel, hence, it won't do anything if you output a matte.
Also, I recommend to fine tune the parameters of KeyLight using the status view.
I show this in this tutorial