It's unclear if you used my handler (I've removed the code from above to avoid confusion) or @cscheiene 's handler?
If you used mine, I suspect you don't have the ZW5 version of the plug. Can you post the Raw description of the device from the web interface? Mine looks like this:
zw:Ls type:1001 mfr:010F prod:0602 model:1001 ver:3.02 zwv:4.05 lib:03 cc:5E,22,59,56,7A,32,71,73,98,31 sec:85,70,72,5A,8E,25,86 role:05 ff:8700 ui:8700