When connecting a receiver to any Smart-Fly PowerExpander or PowerSystem, you should never plug any of the receiver pigtails into any battery port on the receiver. On PCM systems this will usually put the receiver into Direct Servo Control (DSC) mode where it will stop listening to the transmitter and expect commands on the DSC link. On 2.4GHz receivers this will look like a bind plug when put in the BAT/BIND port. It may not immediately turn the bind function on but it may at any time. The receiver connections on the PowerExpanders and PowerSystems are ONLY meant to be plugged into servo output ports. Please e-mail us at Info@Smart-Fly.com if you have any questions.