Ok so after some fiddling, I have found a few things...
If I turn it on or off via the web admin... It takes anywhere from 30 seconds, to 5-10 minutes... But it works (sometimes). Sometimes it doesn't seem to do anything at all.
I have now successfully turned on and off the light 3-4 times, but it only works about 30% of the time, and there is always a significant delay when it does.
That and I noticed in the log it spits out many of these:
01 12/05/08 15:05:21.697 No response from CM11A device. <0xb68f7b90>
Spaced out mostly, (sometimes it spits out 2 or 3 of them, 30 seconds apart, then it suddenly works...
On the ones where it doesn't work, it spits out 0 or more (sometimes none, sometimes as many as 2) of the above errors, plus a final one of these:
01 12/05/08 14:58:21.844 Failed sending address. <0xb68f7b90>
OR one of these:
01 12/05/08 15:00:39.780 Failed sending function. <0xb68f7b90>
Not sure what the deal is there... If I keep spamming the buttons it eventually works.
Via Heyu it works beautifully, nice and fast, no lag (half second or so) and works reliably...
But the fact that it works sometimes in lmce, means it is at least communicating... so what would make it work halfass like that?
I just managed to get a successful "Off" signal without anything logging at all (none of the failed errors, and none of the no response errors) It took about 30 seconds to respond and turn the light off...
Oh and freymann, I doublechecked against your config screenshots, mine are configured identically in web admin.
The only thing I am doing that I don't know if you did, is I am using the instructions from the wiki in the X10 page about setting up the CM11. (It tells you to modify the template of the CM11 first so it is a "generic" device not just "lighting" so it can work with more devices... I did that change.)