Atmel SAM3X8E Native Port not recognized

Hi,

I design my Arduino Due for learning draw pcb,boot microcontroller and assembly component.I use arduino due schmatic design after assembly all component.I programmed atmel to use programming port ıt work.After I test native port for programming atmel but ıt did not work :( . Computer not recognize Arduino Due. I try a lot of time connecting with computer(Arduino IDE) but still not working. Can anyone help me.What is the wrong. Is any program or component necessary?

Good work.