do you even have mochad started?
does mochad show up in ps list for the machine?
what happens when you try to run mochad from the command line?
you may want to google a tutorial on getting mochad running on a pi and get to a point when you can successfully use send commands on port 1099.
This is a good discussion https://forums.homeseer.com/forum/lighting-primary-technology-plug-ins/lighting-primary-technology-discussion/x10-homeseer/107841-zee-s2-1132cu-controller-on-cm15a-plugin-will-not-communicate-hdwe-not-supported/page2
find other similar things and getting talking on 1099 first - also make sure your power supply to the pi has enough amperage - lot of people use under-powered phone charger and they don’t supply enough power to the USB ports