Native port driver BSoD

I seem to have the same behaviour as in the previous message :64 bit Windows 7 SP1 and processor Intel Core 2 Duo CPU P8700 2,53 GHz,
Arduino Due.inf driver causes BSoD.

and if before driver install , I press ERASE (communication erase button) the Native port is recognized as Bossa port ok and I can download sketch to
Due but after the download ends with CPU reset , new driver installation starts automatically and with Arduinodue.inf which causes then again BSoD.

My test code which downloaded when as Bossa port :

void setup() {
  // initialize serial communication at 1200 bits per second:
  Serial.begin(1200);
while (!Serial);  
}

// this input is just to cehck that serial comm works
void loop() {

  int input_data = REG_PIOC_PDSR;
  Serial.println(input_data);
  delay(1000);        // delay 
}

tested also Native port driver installation in Windows XP SP2 machine and same behaviour as above ,

the Programming port works perfectly in both operating systems,

By the way: can Native port operate with higher speed than Prog port , where max. seems to be 115200 , with higher baud rates (230400 and 460800) starts giving errors,
I would like to operate with higher speed , therefore interested in Native port ,

BR,
Seppo