RE: where's the buck?
Is your camera facing out to open food plot areas???
Most bucks won't stand out in the open like that... mature ones anyways. Try moving your camera away from open areas? I'd probably try about 5 - 10 yards inside of the tree line but keep it near deer paths.
I don't have any experiance with those game cameras, so take my advice with a grain of salt!
-Good Luck!