That is why I am writing, trying to find out how to make it work without the computer
The CM19a has no internal memory in it, so it needs a computer to control the X10 devices.
Other than replacing the CM19A with a CM15A (if they have them in stock right now), the only other option is to get another computer to use to control it using your currently programming in AHP.
As Brian said, you could get a MT13A, but you'd have to re-program all your timers into it. Of course, I doubt you have a phase coupler (since you are using two TM751's), so a single MT13A might not be able to cover your whole house. For that matter, a single CM15A might not be able to do it, either (since it will want to transmit over the powerline, not RF).