An other thing is I know that there are
switches that have a minimum wattage
requirement - If your light is less than 40
watts(example only) it will not operate
properly - above this minimum the switch
operates all the time. Some switches are
rated only with incandescent lights and not
for use with flourescent lights. Is there
anything on that line that could be sucking
up the signal (ie: photocopier,
computer/printer, other lighting, UPS or
other power supply, transformers, powerbar
with surge suppresion, TV) - these can all
modify the quality of the ac power coming
to your switch. They will absorb the X10
PLC signal or introduce a lot of noise on
to the power line that will cause
intermittent operation. Can you check to
see if another switch works OK (maybe
another model of switch). Can you turn the
switch on with another X10 device - just
not able to use AHP/CM15A or does the
switch just not work unless it has been
manually turn on first?