[jhautz]

is your radio throttle centered? If you arent in the neutral position some ESCs have a fasty built in so they dont just runn off on you when powered on and the throttle isnt at neutral.

If you not sure you could try seting your radio trims and EPAs to 0 and recalibrate the esc to the radio. its possible there is something out of adjustment that the esc doesnt like.