Hi bud
buzzers are great as well as many other flies but it depends on what they are feeding on.
Just as important, if not more important, is getting the depth right. Once you've cast out count in seconds before retrieving and fish like that in an arc. If you get no joy start the arc again and let the line sink longer the next time. Once your covered all the depth ranges you can then try different flies.
Lures are great most of the time because if you get the depth right the trout can't seem to resist them as a lure triggers their attack response...a bit like a cat with a piece of