Println not working

I'm using an Arduino Due and I can't get println to work. I'm using the ReadAnalogVoltage example and everything else is working fine, I just can't get the message to appear in the console. I'm new to this stuff so if there's any other information I should provide, please let me know!

Please show us your sketch.
Or is it exactly the same as this one : http://arduino.cc/en/Tutorial/ReadAnalogVoltage ?

What happens if you open the serial monitor after the upload is ready ?

Well, that solves the problem. I'm used to working with Processing and was expecting it to print in the same window as the sketch. Thanks for your help.