You may have to calibrate the ESC to your TX stick parameters if this is the first time you are using the ESC with your TX. In other words. You have to teach the ESC where your TX throttle stick max high and max low positions are. Here is a link to your ESCs manual. Read the section called "THROTTLE RANGE SETTING" on page three.
http://www.hobbyking.com/hobbyking/s...X189350X31.pdf