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avrdude: stk500_recv(): programmer is not responding?

Hello,

I have an Arduino uno with Atmega 328 pu and arduino ide 1.0.6programming language. I am using a Mac10.6.3. Whenever I try to upload a program, It tells me avrdude: stk500_recv(): programmer is not responding. I have downloaded all the drivers and normally the port that the Arduino is on starts with  /dev/tty.bluetooth, but that does not show up. I have tried on a PC also and it doesn't upload either.please help me.

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Is there a bootloader on the Arduino, e.g. did you upload sketches in that with success?
Programmer not responding sounds to me like you are trying to use it as a flasher for another Arduino.
Make sure to use the right com port settings on all machines and that the correct board is selected in the Arduino IDE.

Sounds like a dead Arduino to me. Try another one.