I have an eclipse 7 spectra that I have just purchased used and when I set my frequency to channel 52 and then turn it on and then turn on my receiver I get nothing. The controls on the tx don't do anything. It seems as if it will not connect to the receiver. I have tried this on a Hitec o5s and a tower hobbies system 3k receiver, in both cases it did not work. I also get significant twitching, especially with my tower hobbies receiver. I tried both negative and positive shift with no luck. Am I doing something wrong or is my tx shot. Thanks in advance.