spacing-spanner

[Alan Fabian]

Hi,
SpacingSpanner does not its work in my case. I just want to strech  
the distance between notes here, but #'shortest-duration-space and  
#'spacing-increment have no effect. Thank's for help:
"
\include "deutsch.ly"
\score {        
        {
        \time 12/4
	fis'^"R[1]"_"7" d' des' as'^"R[4]"_"9" b' f' e' h'^"R[8]"_"12" a' c'  
es' g'
        \break
	\transpose fis' h' {fis'^"R[8]"_"12" ais' h' e'_"return 10" d' g'  
as' des' es' c' a' f'}
        }
        \layout {
		ragged-right = ##t %keine Skalierung der Notensysteme auf die ganze  
Seitenbreite
                \context {
                        \Staff
                        \remove "Time_signature_engraver"
                        \remove "Bar_engraver"
                        \override Stem #'transparent = ##t
                        %\override SpacingSpanner #'spacing-increment = #4
                        \override SpacingSpanner #'shortest-duration-space = #8
                }
        }
}
"
Alan