FabioBarbosaGomes Hello!
We cannot exactly help you with setting up the tracker since the setting is different for all trackers.
First of all, try to see if everything matches the instructions for setting up the tracker. It is possible that you additionally need to install software to configure the tracker; in this case, you can also make sure that the tracker is charged and, if necessary, in accordance with its instructions, that it is turned on.
But best of all, in this case, try to contact the manufacturer or seller of the tracker.