Flash crashes

programming flash
1

i am experiencing this automatic flash crash:

if i run this code on frame 1 everything is ok(this is a simple function that scale a clip):

function one(){
    clip.scaleX+=.01
    clip.scaleY+=.01
    var _timer=setTimeout(one,1)
    trace(_timer)
    if (_timer==135){
        clearTimeout(_timer)
    }
    
}
one()

if i make a keyframe at frame 15 for example and cut and paste this code , flash will crash, anyone have an idea why?