Tell us, step-by-step, exactly what you are attempting to do with the PS2 engines and exactly what happens when you do so.
Make it a dialog, i.e., what you do and with what DCS responds.
Further:
- Also,which channel has the problem?
- What happened when you swapped channels? Did the problem move to the other channel or stay where it was?
- How are you powering the TIU when you use the variable channels?