Hi @brenofrocha, sorry to hear about your issues. Can you confirm you are using the Tobii Unity SDK for Desktop API (https://developer.tobii.com/tobii-unity-sdk/) as we have a number of Unity bindings available.
Also, I assume you already went over the guide @ https://tobii.github.io/UnitySDK/troubleshooting#my-gaze-aware-objects-are-not-reacting-to-eye-gaze
Are you able to extract gaze data at all in your unity application?