Cannot detect forward/re​verse limits

Question

I'm having trouble with the forward and reverse limit switches for my stepper motor system. When I create an NI Softmotion axis in Labview, no matter how I configure the limit switches, they either show up as both active or both inactive, regardless of the position of the platform. For my limit switches, I am using photointerrupters. When I do not have any of the hardware turned on, the photointerrupters work as expected and give a 0 V signal when the platform is not at the limit and gives a 5 V signal when the platform is at the limit. But when I try to use the interactive panel in Labview (or in a VI for that matter too) the limits aren't detected and behave differently as well. I had a voltmeter hooked in to see how the voltage was behaving and the voltage readings were odd. In one case when I tested each switch's "active" signal, one of the limit switches was at 6.7 V and the other was at 3.7 V even though they had the exact same wiring and setup. I am completely stumped on how to wire these into the system to make them work or how to configure Labview in order to correctly recognize these limits (Meaning sourcing vs. sinking and active state being on/off). I have searched forums and manuals, but I cannot seem to find a solution. Here are more details on the system:
The stepper motor is moving a platform back and forth and the stepper motor is being driven by a Kollmorgen P70530 stepper drive. To communicate between the stepper drive and the computer, I am using a cRIO 9076 with a NI 9512 in the chassis. To connect the limit switches into the system, I have been using the NI 9512 37-pin terminal block. The photo interrupter that I am using is a Sharp GP1A05 OPIC Photointerrupter with Connector. For this photointerrupter, it has 3 pinouts: a Vcc (voltage source) input, a GND input, and a Vout output. The Vcc is supposed to be connected to a 5V source and GND to ground (obviously) with a pull-up resistor between Vcc and Vout (I am using a 10k Ohm resistor as that has what has worked for me in the past with this specific photointerrupter). Vout is supposed to give a 5V signal when the limit would be active and 0V when it isn't active. The way I had connected the photointerrupter to the 37-pin terminal block was as follows: For the forward limit, I had Vcc in pin 9 (+5V OUT), GND was in pin 3 (COM), and Vout was in pin 1 (Forward Limit). For the reverse limit, I had Vcc in pin 9 (+5V OUT), GND was in pin 24 (COM), and Vout was in pin 20 (Reverse Limit). I have also tried connecting the GND terminals of the photo interrupter into the GND (Shield) pin on the terminal block with no success either. As for Labview, I am running Labview 2011 SP1 on my computer. 
If you have any insights, I would greatly appreciate it if you would share them as I am truly stumped with something that seems on the surface to be quite trivial.
Thanks,
Steve
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Answer 1

Steve:
Glad you got it to work!
I'd still like to hear from NI why the specs on page A-3 are calling logic out voltage levels for the limits (I had to clean up some of the unit and GT/LT symbols):
Forward, reverse, and home inputs
Input type ........................................ Programmable: sinking or
sourcing
Digital logic levels, OFF state
Input voltage ............................
<= 5 V
Input current ............................
<=250 uA
Digital logic levels, ON state
Input voltage ............................ 11 to 30 V
Input current ............................
>=2 mA
Input impedance.............................. 30 kohm ± 5%
Min pulse width
2............................. 100 μs
-AK2DM
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