Good morning I just bought a EOS TImer Remote Controller TC-80N3 from an Amazon seller. When I connected the controller to either, 5D mark II or the 40D, the cameras start to shoot alone randomly. I made sure all the settings are in 00:00:00, timer, intervalometer, long exposure and multiple frames. Any idea of what it may be? Is it a defect of the product or Am I doing something worng? Thank you for any advice.