(Solved) New Install Won't Composite

[frogprince]

Once I got Lite up and running, I moved the tool bar to the top and then installed Cairo-Dock. However, it's framed by a very large black box. When a dialog box opened asking if I wanted to enable compositing, I clicked on the green check, but then the dock went away. I checked the Compiz icon, but compositing is turned on. It's also turned on in the Cairo-Dock control panel. I'm using an old nVidia 5200 video card. Does that card not have enough horsepower to composite, or ???

Thanks in advance.