Patrik and Anders.
I tried the code again with the lastest version of GazeSdk (126.96.36.199) and it worked!. The one I had was (188.8.131.52) because I made another application with Tobii Rex and I thought it’s going to work.
Like Markus said, that is a good reason to know the serial number of the device. I always try to make a section in the application to show the information of the connected device. It was easy the last time with the Rex and GazeSdk but not with the EyeX.
Thank you very much for the answers!