You say you're getting a reverse polarity indication, I assume this is at the refrigerator receptacle. If that is the case, take a close look at the terminals on the LOAD side of the GFI. Make sure you are connecting the correct wires to each terminal. Do not go by the color of the screws, look for the word "white" or "neutral."
Frequently, the load neutral is on the opposite side of the case as the line neutral & the same thing applies to the hot wires. This would result in a reverse polarity at the next receptacle if both of your white wires are on the same side of the GFI.
Hope I haven't confused you too much.
As for your other problem, how many wires are there at the refrigerator outlet and how many wires are at the GFI?
[This message has been edited by Tom O (edited October 21, 2002).]