Problem using the Utouch library

I'm using this TFT display touch shield with a Arduino Leonardo board with the UTFT and UTouch libraries. The example UTouch_ButtonTest works apart from the position detected seem completely off. The buttons are not correctly detected. Therefore I have tried the UToch_Calibration example. After updating the UtouchCD.h file according to given values things seem even more wrong. I only get x,y values of 0,0 or -1,-1 no matter were I touch the screen. The new calibration values I got was CAL_X 03D780A2UL CAL_Y 03DC80A4UL CAL_S 0000000UL