Hitec Laser 6 D/R problem
 

The dual rates for the elevator is giving me trouble. The elevator always works on high rates, but sometimes not on low rates. I'm assuming that the problem is in the D/R switch or in the ATV. I took the back off my x-mitter and the D/R switch looks fine. I tested it and it worked, but that only means that it was working at the time. What should I do? I have the means to replace the switch. That's what I'll try unless these radios are known for a different type of problem. Any suggestions?