help for a newbie

[raoul . megelas]

        Hello everybody,

        I am a newbie and a try to enter the following example on Lilypond.
I don't understand what is wrong in my file, the braces semm (to me???)
correct, and Lilypond issues 2 errors.
        Can you help me please?
        many thanks for your response.

        address@hidden
        raoul

=======================================
Running LilyPond...
GNU LilyPond 1.5.9
Now processing: `/usr/music/7ms.ly'
Parsing...
/usr/music/7ms.ly:38:5: error: parse error:
    }
      }

error: parse error

/usr/music/7ms.ly:13:11: warning: Braces don't match:
     \score
            { \notes \context PianoStaff <
erreur: lilypond: command exited with value 256
Traceback (most recent call last):
  File "/usr/local/bin/ly2dvi", line 784, in ?
    run_lilypond (files, outbase, dep_prefix)
  File "/usr/local/bin/ly2dvi", line 391, in run_lilypond
    system ('lilypond %s %s ' % (opts, fs))
  File "/usr/local/bin/ly2dvi", line 315, in system
    error (msg)
  File "/usr/local/bin/ly2dvi", line 213, in error
    raise _ ("Exiting ... ")
Exiting ... 
=======================================
             Papersize = "a4"
 \header {
  filename =    "7ms.ly"
  title =       "7.mes pour les TL3"
  description = "chiffrage, degrés, cadences et tonalités!"
  opus =        ""
  source =      ""
  composer =    "Lucile BOUCHE"
  enteredby =   "R. M."
  copyright =   "Public Domain"
 }

     \score { \notes \context PianoStaff <
       \context Staff = "up" {
        \time 4/4 \clef G \key g \minor \relative c' {
 <g4 bes> <fis a> <g bes> <g bes> | 
 <f a> <f a> <ees g> <ees g> | 
 <d fis2> r2 |
 <f a4> <f bes> <e bes> <e a> |
 <f a4> <d gis> <cis2 a> | 
 <ees4 a> <d bes> <f b> <e c> |
 <a c> <a c> <g2 c> | 
 <g c4> <g bes> <fis2 a> |
 <d1 g> \bar "||"
        } }

       \context Staff = "down" {
     \time 4/4 \clef F \key g \minor \relative c { 
 <g4 d'> <d d'> <g d'> <c ees'> | 
 <f c'> <bes, d'> <ees bes> <a, c'> | 
 <d2 a> r2 |  
 <D4 d'> <g d'> <c bes> <f a> |
 <b, d> <e b> <a,2 a> | 
 <f,4 c'> <bes bes> <g, d'> <c c'> |
 <f c> <f d>< <c2 e> | 
 <c4 ees'> <cis e> <d d'> <d c> |
 <g1 bes>  \bar "||"
    } }
  >
 \paper { }
 }
=======================================