Cannot upload program to Arduino Duemilanove w/ Atmega328 This is the error I receive while trying to upload to the Arduino.
I have installed FTDI drivers for mac. (http://www.ftdichip.com/Drivers/VCP/MacOSX/FTDIUSBSerialDriver_v2_2_18.dmg)

The board is part of a quadcopter: https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=50460

The processor is an Atmel 328P. Do I have the correct drivers? 

What else could be the issue?
You may have wrong port:  /dev/tty.usbserial-A9007LXq works with Duemilanove on my Mac.