I have enable New devices but problem is in plugin when i enable it domoticz doesn't reply i must restart it from shell and its running 5 second when plugin initialize domoticz is down

hi

i have domoticz stable 4.9700 on RPI2 python 3.4.2
domoticz freez after i enable plugin
turnON.py and turnoOFF.py script works OK
what can i check why script don't add device ?