Your
picture should look like the one above after adjusting
your "Shadows" layer style. Now you need
to merge your "Shadows" layer with your
original text layer. In order to do that, first, with
your "Shadows" layer active click on
the empty box
by the left side of your Text layer, doing so will
link your "Shadows" layer to the text
layer, a Link icon
will appear indicating that the layers have been linked.
Now click on the little arrow pointing right
at the top of your Layers window and select "Merge
Linked" to merge your linked layers together. Both
layers now become one, name this new layer "Text".