I have a GE Arctica Refrigerator and recently found that the water line that is on the back of the refrigerator is leaking at the top. This would be the line (if your looking at the back of the refrigerator) that goes diagonally from the bottom left to the upper right. Water is coming from the upper right where it goes into the freezer, in back of where the ice maker is. What parts do I need and can I fix it?

Note: My ice maker has been giving me problems lately. Doesn't seem to be making ice the way it use to... Had an issue with the water freezing coming out of the tube in the freezer. I turned the temp down and that seemed to help. It's still not perfect though.

I appreciate any help you can give me.