instrument name does no appear

[Julien Ricard]

hi,

I've installed Lilypond 2.2.4, runned one of the example:

-------------------------------------------------
% Generated by lilypond-book
% Options: [quote,fragment,verbatim,raggedright]

\paper {
  linewidth = 160 \mm - 2.0 * 9.0 \mm

    indent = 0.0\mm
  raggedright = ##t
}
\score{
  \notes{
      \notes {
\set Staff.instrument = \markup {
  \column < "Clarinetti" { "in B"
    \smaller \flat } > }
 { c''1 }
}
  }
}
-------------------------------------------

It works ok, but the name of the instrument does not appears in the 
output pdf file. Any suggestion?
Thanks
Julien