Load cell with HX711 issue

I have an issue, i didn't get to tare my Load cell (120 kg) with the HX711.h lib
I don´t know if is a hardware problem.
When i tare without weight it didn´t get zero.
pls help

Are you running the example programs , and have library installed ?
The examples provided allow Tare and calibration of the load cell , they worked ok for me .