I recently purchased a parkzone vapor and ember in the bnf models i had no trouble binding the vapor to my dx 7 radio but for some reason i cant get the ember to bind . The first time i tried it the light quit flashing on the plane and the rudder and elevator worked for just a second and then it did nothing and so i tried to rebind again several times and even put both radio and receiver battery on charge all night and still im having no luck! Any ideas what im doing wrong?