Okay...

First off, the version of emplode should match the version of the player software. That is a must. I recommend 2.0 final for developers as the best option for now.

Secondly, you do not upgrade the firmware through emplode. You would use the upgrader program. Make sure that your versions match.

Double check your terminal settings for your serial connection. If your serial connection is not working, you will not be able to upgrade the player.

Do not run the builder unless you are trying to start completely fresh (i.e., brand new hard drive). This is destructive and will destroy any music or configurations on your player.