joaopauloln, you have the same problem as I do. The CM15A just suddenly stopped working. Actually my unit doesn't even can control properly any powerlined X10 modules. Some told me maybe it was the separated electrical phase in my home. I tried different outlets and it doesn't do any good.
At some point, it could only TURN OFF but will NOT turn ON any X10 lamp unit. Yes, only OFF will work.
So just last 2 weeks ago sent it back to replacement... and check my other post... I didnt even realized that they will send me a CM19A... which is a PC X10 unit connected via USB. That you are required to have your computer on.
So.. before you want to send it back for replacement... think it over... they dont have the CM15A anymore... That is sad...
It sounds to mike like one of two possibilities, neither of which is caused by a defective CM15A:
1. you switched to Compact Florescent bulbs, and the switches no longer have power if the light is off. The fix for that is to make sure there is at least one Incandescent bulb in each fixture.
2. You upgraded from an older version of AHP, and now your non-SoftStart modules were being sent the wrong commands. The fix for that is to change your modules from the "Lamps" category to the "Old Lamps - no SoftStart" category.
Unfortunately, it sounds like you sent your CM15A back to X10, and they seem to be out of them. Unless you can get them to send your old one back to you, I'm afraid you're out of luck.