Brain and Charles,
Thanks so much for your feedback. Charles, I'll try your experiment tonight. Brian, I did set the Insteon wired outlet to an X10 Primary Address. Iused my clock/timer controller (plugged into the saem outler as the CM15A). As I mentioned, the X10 clock/timer controls the Insteon outlet perfectly, just not the AHP software. By the way, yes, I did try to set-up the Insteon outlet as an X10 Appliance Module. There was no difference.
I'm leaning towards the CM15A being the problem. I downloaded a cool little iPhone X10 application that uses a utility loaded on my PC and the CM15A to control my X10 modules with my iPhone. Sure enough, it works perfectly with the X10 modules but it can't control the Insteon outlet.
If I do determine the CM15A is the problem, is there a different brand controller I can buy (that controls both Insteon and X10) that's much more reliable? My only concern would be whether it's compatible with this cool iPhone application. It's made to be used with the CM11 or CM15A althougth I guess I could leave my CM15A plugged-in for this application even if I also had a diffent one for the PC software.
-f