is it very common for the relay from all electronics to cause problems. i just hooked up my rs pir with one and it is acting really weird.i power it up and it will trigger the camera when it sees motion for a few times and then it seems to stick shut. i try to manually press the camera button and nothing happens.if i power the pir down and start over it will work ok for a few more times and then lock up again. i am really having a hard time with this thing. what could it be.