same problem is acquired in my drone. after that I understand some hints.
hints:1. First I connect the ESC wires in KK board is in my wish not in Order
. connect the esc wires in order as per diagram.
2. I thought CW and CCW props are mounting on motor in upward direction (1045), But it is in Downward direction. Before mounting propeller please note down which rotation it rotates gives downward Thrust.
3. First I don't know what is the purpose of Self-Level settings
. my first flight is ended with crash. turn on the self level settings in you FC. then only it gives stabilization of your quad. stabilization is less than the other FC's which has GPS.
4. check the pointing nose of FC. fix it with the perfect direction in your quad as per your motor configuration.
This video very helpful for me.
I hope this will help you!!!
Thanks