Ok, similiar issue here, with an sr227 outlet...
A little different, but this is what I'm doing. I have a special RF module plugged into the x10 outlet. This module sends an rf signal to control a motorized hunter douglas shade. For some reason it won't work unless I plug in a Xpff filter into it first, then it works.
The device is setup to work for a switched outlet normally... FOr ex, if you have a normal light switch in a room that controls an outlet. When you turn the wall switch "on" that controls the outlet, the hunter douglas rf adapter (has a watch battery in it) senses when the electricity is turned on for that outlet, and sends an "on" command via RF to the motorized shade. When you toggle the wall switch off, then the shade goes down. THis is with normal regular switches, nothing X10.... It works find everytime this way.
BUT, of course I want to do automate with x10, so I replaced the original ac socket with an sr227, and pluged in the rf adapter, and then toggle on/off from my iphone app to turn the sr227 on/off, but for some reason it doesn't sense that the electricity is being turned on/off, but DOES with the filter plugged into the sr227 outlet, then the rf adapter.
Now, I tried the extension cord trick listed above, with having a lamp also plugged into the same outlet as this rf adater, and it worked. No filter needed! It seems the added load causes the shade to work and could be that the filter link is adding enough load to the X10 module so it performs correctly. A friend is telling me it has something with current sensing.
So, I guess I may have figured out how to fix the original problem in this post, add a filter and it will add the load needed to fix the issue, BUT I want to find a way to get this to work without the filter and without having to plug a 2nd item into the outlet to get it to trigger this rf adapter.
Ideas?