What could be wrong?

Ok here's my 2 cents. I have the EZ-run 60A and the KD36-50-011s. I just got it running a couple of weeks ago. First of all the soldering is just fine. The small cap is supposed to be connected to the + wire. That is not the source of your problem.

The calibration process was a little confusing to me when I first went through it, I can understand that you messed up. Did you repeat it correctly? It could be the motor if your not hearing the beeps (its the motor that actually beeps). Do you have another brushless motor to try it with?

And as for the 0 setting, I believe it was the punch setting being set to 0 that fried the 150A ESC, not the timing, but yes probably a firmware bug. I just read that thread recently.

-Jeff