DM6 firmware will not update, "Read Data Unexpected" or "Wait Time Out" error


When trying to update my kit with the new firmware, I either get a "Read Data Unexpected" message, or a "Wait Time Out" message. I've followed the instructions and have put my kit in the --N mode. The only difference in the instructions is that my kit is not listed as 'e-drum', instead it is listed as 'Alesis DM6'.

Some advice on how to solve this would be helpful! I've tried on a Win7 and Win8 machine.
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