Im trying to use a flysky is6x tx with a ia6b rx and a ZTW Seal 200 AMP, or Swordfish 200 AMP. Both ESC's have BEC's. So far I can not set end points, and the esc does not recognize the cell count on batt. I am using the #3 input on rx for esc, and #1 for servo. Servo works fine. The only ESC that has worked is a Dynamite 90 A. Can someone please enlighten me as to what I am doing wrong? Thanks