I have several of these and a couple I've modified with a Taspi zeroW board. The other day I added a few new receptions with USB ports intergrated into them. I tested them for X10 issues after installing each and no issues. However I now see I can't control my Christmas tree lights.
Wierd thing is other devices further down the circuit work. The WM100 works fine to control it as does another CM15A. I have a feeling this unit maybe failing but I need to play arround a bit the address is A15 my other devices on House code A work but I've not tested any above A8 other then A15 as yet.
This just keeps getting weirded, it seems no x10 command is making it to this outlet from that particular CM15.
Using my XTBM Pro meter I see no x10 activity from this CM15A ::) :' and no noise. As I stated before signals do go past this outlet to the next outlet further down the circuit from this CM15A.