Problem with ShadowBox

[L. Gonzalez]

Hi,

I am a fairly new user and am trying to draw a box with shadow on my page. 
However, I get this error:

     5,1: symbol @PageBoxType unknown or misspelt
     6,1: symbol @PageBoxMargin unknown or misspelt
     7,1: symbol @PageBoxLineWidth unknown or misspelt
     8,1: symbol @PageBoxPaint unknown or misspelt
     9,1: symbol @PageBoxShadow unknown or misspelt

What can be wrong?  I think I am doing everything right.  But maybe I am
missing out on something subtle.  I use version 3.2 on a win32 platform. 
Comments are appreciated.

Thank you,

Lissette