object width = 0 no matter what I do

[ziriguidum]

	trace ("spc1.scaleX: " + spc1.scaleX);  // = 1
	trace ("spc1.width: " + spc1.width);  = 0
        spc1.scaleX = 1;
	spc1.width = stage.stageWidth - 20;
	trace ("stage.stageWidth: " + stage.stageWidth); // = 1000
	trace ("spc1.scaleX: " + spc1.scaleX); // = 0   why?
	trace ("spc1.width: " + spc1.width); // 0  why?

Could someone please explain me that ????
Thanks in advance!