Thank you very much for answering.
For me it is very difficult to read x-10 issues, since it does not speak English, and I have to translate by google documents.
Well if as read in one of the links provided in the previous post indicates that there may be some noise or something that is interfering with the signal.
Well do some testing and MC10A worked in the room in question, if you disconnect all devices (but that's not the idea)
In the room are connected
1. TV
2. DVD
3. radio
4. wifi
5. fan
6. Minidimeer x10
7. Two table lamps
8. satellite box
9. Cell phone chargers.
I imagine that the devices cause excessive interference of the signal, sometimes not allowed on or off the lamps, or simply not be turned off.
Migo Well we know the problem I recommend that can do to make the MC10a work in this room ... thank you very much.