X-10, GFCI, outdoor lights & problems

[neergqj@xxxxxxxxx]

Hello,

I have searched the archives, and I have seen anecdotal issues. Here is
my situation:

Today I installed 5 outdoor 120v light fixtures (porch lights). Two are
fed from an existing wall switch that I replaced with an X-10 switch.
The remaining 3 lights are on a new extension of a circuit downstream
of a brand new GFCI.

All 5 lights are on the same code (I-9). When I send the "on" code from
inside (from a PHC02 maxi controller), the on and off are somewhat
sporadic.  The non-GFCI circuit responds as directed and the downstream
X-10 reciever does not alway "hear" the instruction.

If I plug the transmitter in downstream of the GFCI it all seems fine.

Is there a GFCI/X-10 signal issue? If so, how do I work around?  I
could change the wiring so that the 3 lights downstream of the GFCI are
fed from a different non-GFCI circuit.

What do you think?