How are you choosing your rig set up?
It sounds like your wanting the fish to strike a fly on the surface? I am no expert, but I have found that this happens when a recent hatch has occurred that will float on the surface. Otherwise, one is better off trying a submerged rig and/or both.
Also, I would like to know how others go into a new area and set their rig up. I know hard cores would take a look at the current hatches and tie up their own fly. I don't believe I would get to that level of sport.
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "Wow! What a Ride!"