can't see any image symbol with 4.6

[toni hernández]

hi all,

I have updated my mapservr application from 4.4.1 to 4.6.1.
I have lots of layers, 40 something
No error is thrown but I can not see any symbols now. Does anyone know why?

this is a piece of my map file, and may symbolset file

PIECE OF MAP FILE
--------------------------
LAYER #Aquí comença la capa de Naufragis
      NAME NAUFRAGIS
      TYPE POINT
      STATUS ON
      DATA "Naufragis"
      MINSCALE 0
      MAXSCALE 500000

      CLASSITEM "Codi_act"
      CLASS
      EXPRESSION "301"
          SYMBOL 'Mercant'
      END
     
      CLASS
      EXPRESSION "302"
          SYMBOL 'Guerra'
      END

      CLASS
      EXPRESSION "303"
          SYMBOL 'Pesca'
      END

      CLASS
      EXPRESSION "304"
          SYMBOL 'Cabotatge'
      END

      CLASS
      EXPRESSION "305"
          SYMBOL 'Carguero'
      END

      CLASS
      EXPRESSION "306"
          SYMBOL 'Transport'
      END

      CLASS
      EXPRESSION "307"
          SYMBOL 'Preso'
      END

      CLASS
      EXPRESSION "308"
          SYMBOL 'Remolcador'
      END

      CLASS
      EXPRESSION "309"
          SYMBOL 'Transbordador'
      END

      CLASS
      EXPRESSION "310"
          SYMBOL 'Salvament'
      END

      CLASS
      EXPRESSION "311"
          SYMBOL 'Petroler'
      END

      CLASS
      EXPRESSION "312"
          SYMBOL 'Guardacostes'
      END

      CLASS
      EXPRESSION "313"
          SYMBOL 'Correu'
      END

      CLASS
      EXPRESSION "314"
          SYMBOL 'Desconegut'
      END
TEMPLATE template_naufragis.htm
TOLERANCE 20
END

PIECE OF SYMBOLSETFILE
------------------------------
            SYMBOL
              NAME "Naufragis"
              TYPE PIXMAP
              IMAGE "Naufragis.GIF"
              #TRANSPARENT 1
            END
           
            SYMBOL
              NAME "Mercant"
              TYPE PIXMAP
              IMAGE "Mercant.GIF"
              #TRANSPARENT 1
            END

            SYMBOL
              NAME "Guerra"
              TYPE PIXMAP
              IMAGE "Guerra.GIF"
              #TRANSPARENT 1
            END

            SYMBOL
              NAME "Pesca"
              TYPE PIXMAP
              IMAGE "Pesca.GIF"
              #TRANSPARENT 1
            END

            SYMBOL
              NAME "Cabotatge"
              TYPE PIXMAP
              IMAGE "Cabotatge.GIF"
              #TRANSPARENT 1
            END

            SYMBOL
              NAME "Carguero"
              TYPE PIXMAP
              IMAGE "Carguero.GIF"
              #TRANSPARENT 1
            END