Screen Source Won't Display

I’m trying to initiate a screen source into my show. I’ve got the source set and the size as I need it.
But the layer won’t actually appear in my show. While I’m moving the (or anytime I click on) the source outline, the image pops up in my show. But as soon as I let go of the mouse button, the image disappears from it’s layer.
Any thoughts??

Mac Pro with 24GB Ram
ATI Radeon 5770
OSX 10.8.5
Boinx V 1.9.9