Loading Image Bottommost Layer

I’m loading an image in a UILoader Component (created during runtime).

var lb:UILoader = new UILoader();

Now when i load any image into this then it loads on top of everything.I know this is because it goes over the top of stack. But is there any solution by which i can move it downwards or even at the bottommost layer.

I’ve tried setChildIndex(lb, 0) though but it didn’t work.

Thanks in advance!