slurDown ignored?

[Leonardo Herrera]

Hi all,

I have a question: why the \slurDown instruction is ignored in the
following snippet?

\version "2.12.2"
\paper{ ragged-right=##t }

\relative c' {
        \clef treble
        \key des \major
        \time 9/8
        
        <<
                {
                        % \slurDown is ignored
                        \stemDown  \slurDown des2.  ~ des4.
                }
                \\
                {
                        \stemUp f8[f ges] f8[bes f]  ees8[f ees] ~
                }
        >>
}

By the way, I'm typesetting Debussy's Clair de Lune to teach myself
Lilypond _and_ music notation, and oh boy I've been in a ride. I have
set up a Google code repository [1] in case you are interested.

Regards,
-- 
Leonardo Herrera
mailto:address@hidden


[1]: http://code.google.com/p/lilypond-debussy/