Ive NEVER been able to get a 3.5mm cable to work on equipment with an IR in jack and a pronto extender. Even when all the equipment is on the same ground (plugged into the same power strip). My workaround (which is ugly) is to use an IR emitter from the extender, taped to an IR reciever, hooked to an old Niles IR extender, and the 3.5mm cable from the Niles IR extender to the piece of equipment I want to control. It works fine, but leaves a jumble of extra wire and takes another power outlet for the Niles IR stuff. I dont like the looks of an IR Flasher glued to my equipment, and I can hide the jumble of wires used in my workaround.

This has worked on a Pioneer Elite BluRay player and 2 Motorola Digital Cable recievers.

If anybody has a proper solution I would love to hear it. It would help me clean up my wireing.