I'm new to the TSU9600, and have one controlling a Denon receiver via a RFX9600 extender. At least, so I thought. Everything was working perfectly, until I closed my cabinet doors. It turns out, pressing and holding the volume up and down buttons only repeats the IR out of the TSU itself; when it's coming from the extender, it only pulses once per button press. I'm guessing I have to write a script to overcome this, but could use some guidance on how to go about that. I'm a programmer by trade, but I'm just not familiar enough with this unit, and I find the documentation and guidlines to be somewhat lacking from Philips.