Did you keep on the move or were there fish moving where you were fishing?
Vary the retrieve.Think how the naturals move and try to imitate best you can.
Rise and fall is sometimes good with buzzers using a smooth draw to lift the flies then allowing them to fall whilst staying in touch all the time.Sometimes very little movement works or "do nothing"(Arthur Cove) just stay in touch.
Washing line with buoyant point fly like a booby.Bit like a longline

or you could always try....(trumpet fanfare) a BUNG/PIMP indicator

:
All devious dark side tactics which can work on the day.Sometimes

and a rendition of "here fishy fishy" can bring results.
Good luck JP