Did it work when you walked by? It's probably dead batteries or not hooked up right or something. Even if it's pretty high, as long as you point it towards the deer it will work. Try testing it just walking by.
That's exactly what i was thinking Jim.......used to be with my Stealth cams, but now with my Leaf River's I still have to talk myself into double checking to see if I actually turned it on, or if I left the switch in the off or test position........just caught myself leaving one off just the other day........sure wish these brain cells would grow back, LOL