Communication error Arduino Due - ATSAM3X8E

Hello ,
I have just bought an original Arduino Due, installed the drive for communication, on control panel of windows 7 64 bits, it seems that there is no problem on this device it shows below the COM and LPT ports the frase (Arduino Due programming port (COM3), I already set the baud rate for 57600, In the moment I try to upload the sketch this message apears " avrdude: stk500_getsync(): not in sync: resp=0x00", into Arduino IDE the board is set as Arduino Duemilanove w/Atmega328 and the serial port is set as COM3 , with the symbol mark. the Led L is ON all the time, and the led RX blinks on 3 times during the attempt to program the Atmel. I also replace the usb cable for another new one but no success.
Please I hope someone can help me...

Thanks in advanced...
Marcio