center swf in browser when compiling as3 project in flex builder

[jerryjj]

Hi,

when you publish a swf from within the flash ide and put the publish settings on 100% x 100%
noscale
html alignment : default
flash alignment : center center
the swf will appear in the center of the browser, horizontally and vertically speaking.

But when I compile an as3 project with flex builder, I can't get this done.

What would be the way to compile so that the swf is noscale and centered in the middel of the browser?

I tried

[SWF(backgroundColor="#ffffff", frameRate="40" )]

public class Main extends Sprite{


public function Main(){

stage.align = StageAlign.TOP_LEFT;//tried it with or without this line
stage.scaleMode = StageScaleMode.NO_SCALE;
etc...

I compared both html sources but they don't seem to differ, so I'm pretty confused. Both have width and height 100% and align = "middle"

thanks,

Jerryj.