My new EoTech 511 that I just put on my rifle yesterday has something wrong with it. It was working fine until I was showing it to my girlfriend this morning. When I went to turn it off, nothing happened. Both buttons work, as you can still adjust the brightness of the reticle, but when you press them together nothing happens. I have to remove the batteries to turn it off. Anyone have any ideas or am I just going to have to ship it back to the factory?