Hi @rvejendla, I can assume you have already ran through the Pico setup guide @
https://vr.tobii.com/sdk/develop/unity/getting-started/pico-neo-2-eye/
In this case, can you tell us if the sample applications work at detecting gaze? If not, this may indicate an issue with the headset.. are you at least able to properly calibrate and test that we may discount a physical hardware problem?