Have this D/W Sensor included without security and am using the Generic Z-Wave Contact Sensor drivers.
I can remember having to unlock the configuration after including before being able to change any other parameters.
To do so, use this tool to change parameter 252's value to 0.
Had the same issue after putting it in place, so I woke it up, performed a Z-Wave repair of it and some adjacent mains-powered devices.
Not sure if this made really sense, but the sensor reported after doing so. 
