neutral safty switch?

Wow talk about a coincidence. I just put a brand new switch in a buddy's Challenger today and it's defective. Same exact problem too. No reverse lights. I took it back out and bench tested it and found it shows continuity on the bench but as soon as you just barely touch the middle pin (that's what activates the reverse lights) it shuts off. It's way over sensitive. I tried shimming the switch but there was no way to get it to operate the reverse lights and the neutral start section work. Going back to NAPA tomorrow for another to try again. UGH!