Hi Karlos1969,
Welcome to the forum.
If your generator worked fine on your friends Bradley, and if you did not use your short cord when you swapped out the generators, i would guess the problem is with your short jumper cord, or the jumper cord connector on cabinet. Clean the plug ends, and connector with an electrical contact cleaner. You could use WD40, but that tends to leave a residue that can collect dust and other debris. If that doesn't work, the problem is most likely your cord, and it will need to be replaced.
Let us know how your problem was resolved.