Lots of things could be wrong. You need to give MUCH more information before anyone can help you in a specific way:

What are the makes/models of the switches?
What is the make/module of the transmitter?
How are you remote-controlling the transmitter?
Does it work if you manually switch it on with the transmitter? Or just at the switch?
Do you have a coupler/repeater installed at your breaker box?

I'm sure there are other questions to ask once you answer these.


Joe