AbsoluteLayout width in a Panel

I am trying to set the width of a AbsoluteLayout inside a Panel. I want the AbsoluteLayout to be as wide as the Panel is. For Panel I am setting:

panel.setWidth("100%"); //$NON-NLS-1$
		panel.setHeight("90%"); //$NON-NLS-1$

and for the absoluteLayout:

setWidth(600);  
		setHeight(200); 

The absolutelayout is not taking panel's width.
I have tried:
setWidth(null); -> in AbsoluteLayout
setFullSize() -> in Panel.

Tried increasing 600 to 1000. But nothing works. What is it that I am missing?

Well, just a hint: Mixing absolute pixel- and relative sizes cannot work per definition. If your browser-window is wider than 600px, your AbsoluteLayout will always be smaller than the Panel. Don't know about AbsoluteLayout as I never used it - but you should set the width of the layout in relative matters too. If that doesn't help, try to set the expand-ratio to 1 and / or add the AbsoluteLayout as Content (setContent) instead as (sub-)component (addComponent).
Then you could finally use firebug and try to inspect the generated HTML, maybe you find something interesting there.

Thank you for your reply. Firebug is a life saver :)