What version of Windows are you using. I don’t know too much about Windows but have you tried uninstalling AHP and reinstalling using the AHP creators install procedure. Sounds like you have some form of driver corruption in play. Before you attempt anything further, unplug the new CM15 from your computer, then plug it back in and go to Windows Device Manager and see what is being reported by your USB devices. Your looking for a CM15 USB device obviously. Make sure the old CM15 is not plugged in at the same time. I could sort that problem out in two minutes if it was Linux and not Windows but I imagine the problem would be the same in both operating systems.
Depending on the age of both CM15’s, one being an older model and the other newer it’s quite possible that Windows sees them as different USB devices and won’t assign the X10 driver to the newer CM15 hence why an uninstall and reinstall might resolve your problem. I assume Windows uses a restore to previous point feature so create one before you proceed.