Why doesn't this text cast shadow on backround?

Hi,

I've tried everything, but there's no shadow.

- For the Light layer, "Casts Shadows" is On.

- For the Text layer, "Casts Shadows" is On.

- For the Background layer, "Accepts Shadows" is On.

I've also tried to change coordinates, zoom, focus distance, but there's still no shadows. The solution should be something simple...

Here is the project file (CS6): https://dl.dropbox.com/u/41982802/shadow.aep

Thanks in advance.