I am adding a circuit to a structure. I ran 110v romex from the cb to a gfci which has two outlets and the test buttons and a indicator light, then ran wire from the gfci to an outdoor ourlet. I am getting pwr to the gfci, but the outlets on the gfci don't work nor does the outdoor outlet. I have the pwr attached to the top two screws and the line to the outdoor outlet on the bottom two screws (black/hot on brass screws & white/neutral on silver screws). I have swapped the input wires to the bottom screws and vise/versa and still not power to any outlets. This is a new gfci unit. Suggestions?