[flexcoders] Dimensions of a UIComponent are allways 0, 0?!

[florian.salihovic]

I have a UIComponent which Dimensions never change?! When i add a child in the 
overriden 
createChildren i expect the dimensions to be changed... but nothing happens...

override protected function createChildren():void {
super.createChildren();
if (!this._uibase) {
this._uibase = new UIBase();
this.addChild(_uibase);
}

The UIBase class is a component made with the Flex Component Kit and it has 
width an 
height > 0.

I have no clue what i am doin wrong...