Green Screen Keylight 1.2 issues

Hello.  My first time messing around with Keylight 1.2 for Green Screen effects.

I have been messing around with it the past couple of days.  I've wanted tutorials.

I even have a couple light sources for my video... but it seems no matter

what tutorial I do or even just messing with the settings. I can't seem to get it perfect.

What is circled in red is what I keep getting. If I fix that.. then I get other issues such as.

I've messed around with, Screen gain, Screen balance, Clip Black, Clip White,

Now I can kinda fix it, but run into another problem, once I do.