I recently purchased an ArloPro system with the wirefree cameras.

I intend to set the cameras up outdoors once I can procure the black skins and outdoor mounts.

Meanwhile I've just got one sitting on a windowsill looking outside, and another watching the inside of the garage.

I've noticed that the garage cam is operating as you would expect, but the windowsill cam picks up nothing that moves outside.

Himself does a 3 point turn in his Wildtrack right across its path and nothing happens.

Is this a common problem with motion detection through a window or should it work?