Judging by what you are saying, I would guess you are oversetting that pin. Don't lift it that high, and if you don't feel it set, try to find another binding pin.
You should read Solomon's book - Detail Overkill. Search the forum for it, it will help you a lot.
I'll be expecting an updae on this
Good luck!
Go ahead, keep plugging away, picking on me! You will end up on bypass or with rigor mortise.
- GWiens2001