Just to make sure. You are hooking the 3 wire lead, with the servo plug on it, into the throttle port of your receiver, making sure it's polarity matches the receiver. When you power up, do you hear a series of beeps or tones from the ESC? The last series should be a series of 3 quick tones, indicating a 3 cell Lipo recognition. If all your wiring is correct, and you hear no tones, them check for loose connections or broken wires. If that is all ok, then you probably have a bad ESC. Return to Hobby King.

And make sure your battery is fully charged. The ESC might not be able to recognise a low battery.