Continuous fft of camera feed not working

I'm very new to LabView, and I've been working on a project for an upcoming experiment in my lab at my university. I'm trying to use Fourier analysis of an interference pattern to measure the shift of the fringes. I modified the low-level grab vi to include a continuous FFT of the image acquired from a camera feed, but the FFT appears to be outputting nothing. Can anyone tell me what I'm doing wrong?
Attachments:
interferm.llb ‏182 KB
Interferm_Block_Diagram.PNG ‏35 KB
Front_Panel.PNG ‏63 KB

Hi Vaeryn,
If you're still having problems could you tell us a bit more about your system (Hardware, Software, etc.)? In the meantime I was able to find this:
Continuous Grab with FFT Mask:
https://decibel.ni.com/content/docs/DOC-25276
I hope this helps!
Kale W.
Applications Engineer
National Instruments
[email protected]

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