The problem is that the ground light does not come on. I checked the outlet and it has the standard three wires: black, white, and the ground, which is atttached to the green grounding screw on the outlet.
The box is plastic, which I thought was the problem. However, I located another plastic outlet box, and the ground light did come on!
This outlet was tapped off an adjacent one. Checked that outlet, which is a middle-of-the-run, and all bare ground wires are pigtailed to the green grounding screw and the metal box screw.
Tried using a second Belkin surge protector, but the same thing happens; it still does not come on.
Tested the ground in the both outlets with a circuit tester and this shows that both outlets are grounded.
Is this situation a cause for concern?
P.S. Contacted Belkin Co. but they were not helpful.
Thanks in advance for any help!