Shapes have me stumped!

[ConstraIT]

Hi Guys
This is a really stupid problem but never the less it is a problem Im facing and have no idea why.
I created a black rectangle shape over a white background, I then created a white curved corner rectangle to sit half over the black and over the white backing. All the layers are in correct placement and it should be showing over the black shape however no matter what I do it is displaying as if it is under the black shape. Any ideas guys would be fantastic because it has me stumped!

PS: Ive added an attachment.

 

[ALB68]

You said you created the black over a white background..what I see is transparent under the black.

 

[IamSam]

On the shape layer that you are calling the white curved corner rectangle, (Rounded rectangle) change your layer mode to normal instead of darken.

 

[ConstraIT]

Thanks IanSam sorted it right out, I knew it would be something simple!