tree bend factor wont work problem.

Hey, My tree bend factor wont work, when i add trees for my terrain and put the bend factor to about "1.5" and when i hit play the trees just stands still like nothing happened ? .. My bend factor are still at "1.5" but nothing happens this didn't happen in the old unity 2.6. I saw another question like this, and the answer was to put a Wind zone and add that to your terrain, and it works yea but i think the trees bends a little wierd, aren't there a way to get the bend factor to work like in 2.6? So the bend factor will work as usually?;)