I am trying to use a Kanda AVRISP-U to reflash some code into the ATmega328 on my Arduino Nano which has the Arduino bootloader on it. The AVRISP-U program keeps complaining: "Your target device is not responding, check power, connections & clock settings". I've double-checked all of the connections from the 10-way connector on the AVRISP-U to the 6-way header on the Nano.
What do I need to do to get it all to work?