Unresponsive Limit Switches

[rfry11]

On Sunday we hooked up our limit switches, which are essentially Vex limit switches set up to output to the Digital Sidecar's Digital I/O ports. I have them plugged into Digital I/O 1 and 3, and the colored wires are set up in this position, from left to right: White, Red, Black. We're using them to restrain the turret to a smaller degree of freedom. I have set up a very simple program that will tell me if the limit switches are pushed or not, I've attached a picture of the program. The problem that's arising is that the switches appear to be unresponsive, because they send no signal whatsoever. So, help?

By the way, sorry for the bad picture quality. Our Toshiba Satellite with a 2.5MB Trident Video Card is good at running Labview, but not so good at encoding pictures in 32-bit color