Re: cant get them on the hook?
In my experience, if the trout are hitting, but not taking, your fly is off somehow. Its close enough to the natural that the trout see it and react. But something throws them off and they pull their punch, so to speak.
During the caddisfly hatch, I had a similar problem. A dozen strikes and no hook-ups. I switched from a size 12 down to a size 16 and hooked up on >90% of the strikes from then on out.
You're really close, I'd recommend going 2 sizes smaller or bigger, changing colors, or changing to similar patterns.