I am using the momentary beeper function and is doíng something simliar. it was working OK but now it seems to get stuck on for a long time. I have two of these modules and only one does it so I will try swapping them around to see if its the module. The other possibility is connected to the fact I am using an RF on command from a CM15 to activate it. The reiliable one is acviated via mains. I did try sending an RF off command after the on but it didn't seem to help. Will post back if I find anything out.