Flex Mobile Projet - ActionBar position

Hi,

I have created a Flex mobile project (using Flash Builder 4.5.1), with ViewNavigatorApplication layout. I want to position the ActionBar in the bottom of the app, rather than the default top aligned. How can I do that?

I tried by setting the actionBar Y as

this.navigator.actionBar.y = 300;

in the creationComplete of the application, but as I navigate to any other view, it jumps back to top.

Please suggest.

Thanks.