2.8 TFT V2 Touch Screen Need a Library

Hi all,
I’m new in this forum.
I kindly ask you an information.
Recently i have bounght a TFT touch shield v2.0 2.8" seeedstudio.
I downloaded the library “SeeedTFTV2.0 Library for Arduino 1.0”

Inside the folder there is an exercise called “touchscreendemoshield”.
I have uploaded this demo on my Arduino and i have opened the serial monitor.

When i touch the screen i should see on serial monitor the coordinates x,y and the value of pressure.
The problem is that, wherever i touch the screen, the coordinates x,y remain unchanged.
What i have to do?

Many thanks in advance

Umberto