Can't get after-title-spacing to work (version 2.13.55)

[Brent Annable]

Hello everyone,

I'm trying to get some extra space between my header block and the first system of my score, but I can't seem to get after-title-spacing to work. I see that previous users have had this problem, and the problem usually seemed to be the installed version. I am using the most recent (unstable) version, but I still can't get the following to work:

\version 2.13.55
\paper     {
                after-title-spacing = #'((padding . 3)) 
                annotate-spacing = ##t
                 }
\header {
               title = "Test score"
               composer = "Test composer"
               poet = "Test poet"
               }
\score {
            c''1
             }

The annotations still show "0.50 padding". Can anyone see what I'm doing wrong?

Brent.