@florian_k1, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project 
See About the Installation & Troubleshooting category.
I'm not familiar with the board (nor with the Due).
How do you power the board? From the Due's 5V pin or from the Due's 3.3V pin? Onto which pin on the board?