Limit Switches on X & Y axes not making contact with anything

Title says it all, any tips to fix this?

New build?

http://x-carve-instructions.inventables.com/step14/

I had the same problem. I think I followed the instructions explicitly, but installed the Y axis limit switch upside down, which makes it miss the bolt that you add for it to hit. And I wasn’t going to dismantle the whole machine in order to turn it right side up. On the X axis,the switch simply misses the bolt no matter what… Not sure if it was designed for a different switch. At any rate, I used the nut for the stop bolt to attach an L bracket. That way the switch can’t miss it. I can post a picture if you like.

Is your Makerslide installed correctly? are the rails lining up with the switches? I know I made this mistake on my first assembly.