I have found a better "work around".
1. I used a TM 751 transceiver set to house code C.
2. I programmed the ELK 9100 to house code C, Unit Code 4.
3. The TM 751 operates the ELK 9100 when I use a remote switch. (Slimeline or Palm Pad)
4. I programmed an AHP macro to send an RF command on code C4.
5. Essentially, the CM15A and the ELK 9100 don't communicate well. (I guess they need counseling
)
6. The CM15A, however, can send an RF signal which the TM 751 receives and, being a transceiver, it sends an X10 signal to the ELK 9100. Because the TM 751 seems to speak ELK better than the CM15A, it turns it on and off quite nicely.
7. I set the trigger on the macro to C8. If I want to turn my pool pump and fountain on indefinitely, I press C4 on my Palm Pad. If I want to turn it on and have it turn off in 4 hours, (or what ever delay I program in the macro), then I press C8 and it triggers the macro.
8. This solutions seems to work great...for now but I should tell you this. I was having some problems with the ELK not responding to any X10 signals. The TM 751 is also an appliance module. I don't use it as one and I don't like the loud "click" of the relay inside so I opened it up carefully and snipped the solenoid wire. The outlet at the bottom doesn't work, (I don't use it anyway), but I don't get the "click" when I use code C1. Now, when I opened the unit up, the antenna wire broke off. I don't know if it was a bad connection to begin with but I fixed it with a little solder and iron. Now it works better than before. I have great range and it "talks" to the ELK 9100 flawlessly. Just something to keep in mind if the above solution doesn't work.
a> Try opening the TM 751 and check that you have a good connection to the antenna. It's a strange setup. The antenna doesn't actually connect to the wire. It connects to a piece of copper that is glued to a piece of plastic that is pressed against the antenna base. Weird but it works.
b> Try cutting one of the solenoid wires. It will quite the thing down and I don't know if that helped me or if it was coincidence but there seems to be a little FM (Freaking Magic) when it comes to this X10 stuff.
Good luck. Sorry for the long post but I was happy to finally get this thing working and wanted to pass it on.