Devices not working thru powerlines.

[billoram]

I installed a 100amp subpanel from my 200amp main to accomidate future generater hookup. I noticed my X10 devices no longer worked on the original panel circuits even when a clock controller and lamp module are plugged into the same duplex recepticle.
But these devices will work on any  recepticle in the new subpanel. It's like the signal is jammed in the old panel.
Any Ideas???