LabVIEW Encoder not reliably returning Rate

[IisMathwizard]

We've also had a problem witho our encoder. At first it was working well and i then went on to do some calibration with distance but after about 5 runs of calibration it was then only producing the values 0 and the resolution of .0038..... something. We looked through my coding and found nothing wrong and then assumed hardware issued. Nothing was apparently wrong and we left the issue for later. Unfortunetly, someone wasn't looking and ripped the wiring right out of the encoder. Nonetheless, it died. We reinstalled it but hadn't wired it up again and tried calibration.