Well now let's see. What type of controller are you using i.e. CM15A and what software are you running? Exactly which modules are not working properly? Have you added any noise generating devices in your home?
The 5 W rule would help in posts asking for help. What is the problem? When the problem occurs? Where are your devices located? Why you think the problem is occurring? Who else have you talked to regarding the problem? i.e. X10 support.
If you would try to be a little more specific I would be glad to try to help you!
Till Later,
Bob