Hello, Francois ,
First of all, it is important to understand that the device works with the data that your tracker sends in messages.
In this case, you need to check the device settings, as well as its state.
For help in setting up the device, it is best to contact the seller or the manufacturer of the device directly, they will be able to provide qualified support. Also, information on setting up the device can be found in the instructions for the device.
You can also write us to firstname.lastname@example.org indicating login, unit ID and device type, so, we can check your issue additionally.