I am trying to repaint light sabers in PS and I am having some trouble. I know theres better ways to do this and alternatives and what not but I want to use PS.

I created an image sequence using Virtual Dub mod saving the files as .tga's

I imported the first frame (.tga file) into PS and created a new layer with a mode of "screen" and checked the box "Fill with screen-neutral color (black)"
I'm following the tutorial from TFN

This is where the toruble starts
I select the the line tool (or pen) and when I select the light saber instead of the selection Ive just made being drawn on the new layer I created ( which I know I have selected and is on top of the image file) a new layer I guess you would call it is created for some reason. Here is what I get after I roto the saber.

I don't know what is going on I hope someone could help me out with this

Thanks in advance guys