Hi @shmulyeng, I realise that we never confirmed which model of eye tracker you are using.. is it in fact the EyeX?
There is a known issue in using the EyeX with the very latest version v2.11 of the Tobii Core Software.
We are actively working on resolving this issue for the next release so if this is indeed your hardware setup, we hope to have a solution for you soon. Thanks.