I try to place the perch on the flight path from the trees to the feeder....you may also have to move the feeder to get everything working right.
Many times they will still fly straight to the feeder anyway, you just have to be patient and persistent.
I find they seem to like a perch that is simple....without so many little branches.
Another strategy is to use some type of hanging feeder and then when you put up a perch move the feeder right under it. Then move it back to it's original spot when you are done shooting.