wms raster image changes symbols colors

[toni hernández]

hi,

I have a wms layer. When is on, it changes the color (from red to green) 
of another layer of symbols.
I have mapserver 4.6.1

this is my wms layer.
Anyone know what's happening?

LAYER
    NAME Ortofoto_5000
    TYPE RASTER
    STATUS ON
    CONNECTIONTYPE WMS
    CONNECTION 
"http://galileo.icc.es/wms/servlet/icc_orto5m_r_r?REQUEST=map&LAYERS=Ortofoto_5000&STYLES=&FORMAT=png&version=1.1.1"
    MINSCALE 999
    MAXSCALE 10000
    METADATA
      "wms_name" "Ortofoto_5000"
      "wms_server_version" "1.1.1"
      "wms_srs" "epsg:23031"
      "wms_format" "image/png"
    END

    PROJECTION
      "init=epsg:23031"
    END
END