I need answere

i have coupled my 3DR copter plane, but the transmiter and the plane is not having communication. the plane has refused to power on ant the mission planner is not working with the plane i dont know what is the problem as i have exusted all the idea i have and it seems not to work so i dont knw if any body has the knowledge and answere to it, the person should profer solutions to me please. thanks for the help and answere.

Please post more details of your hardware such as autopilot used, is a copter or plane? if it is a copter, is it a 3DR diy kit? which one Y6 or quad? did you loaded the firmware to it?