so i bought a complete set of radio and reciever off from a member on here, it's Airtronic M8 with spektrum module and receiver. i brought it to big parking lot today and the radio was lost control like at around 100 - 150 feet away, checked the all the batteries and they're seem fine, i noticed the antenna wire on the reciever is too short, could it the problem? will it improve if i extend the wire? please help thanks!