Shadow in “nextgen-gallery”

I have been trying to get a (drop) shadow to work in nextgen gallery.

I have tried may different changes to the CSS in an attempt to get it to work.

I am using the Rakalap theme, which i have modified to be a back theme.

My test site is http://www.dhphotos.com (A live site which has the type of shadow that my customer likes is http://www.davidhubler.com) Look at one of the galleries, on both sites)

Can anyone help? This issue is beyond my abilites.