Newbie to this stuff, but i'm putting together a scratch built plane, i hooked up the servo's and when i tried it out, all 3 servo's just start jerking around, if i disconnect 1 the other two servo's respond to input and act correctly.I no nothjing about this stuff.can someone give me some ideas and head me looking in the right direction?

old futaba conquest am radio

trying to use a hitec reciever 3chan. has-03mb

9G Micro Servo for RC Helicopter Plane Futaba Hitec