[Geotiff] Problems with raster image

[Germán CONAE]

I need your help. 
 
I made a MAP file with multiple images RASTER (GEOTIFF) but when MapServer Shows them, they appear dark.
 
I copied a portion of the header and one layer to see as I'm generating the outputs.
 
This is an example:
 
OUTPUTFORMAT
    NAME jpeg
    DRIVER 'GD/jpeg'
    FORMATOPTION QUALITY=100
    MIMETYPE 'image/jpg'
    IMAGEMODE RGB
    EXTENSION 'jpg'
END
 
LAYER
    NAME 'MyImage1'
    GROUP 'celdas3x3'
    PROCESSING "BANDS=3,2,1"
    OFFSITE 74 75 77
    DATA 'image_1.tif'
    STATUS ON
    TYPE RASTER
    METADATA
        WMS_SRS 'epsg:4326'
        WMS_TITLE 'Celdas-3x3'
        WMS_GROUP_TITLE 'celdas3x3'
        WMS_FEATURE_INFO_MIME_TYPE 'text/html'
    END #METADATA
 
    PROJECTION
        'init=epsg:4326'
    END #PROJECTION
END #LAYER
 
I tried to use the library GDAL / GTIFF, but didn't show nothing.
 
any suggestions?
 
Thank you in advance
 
 
Lic. Germán Weber
Buenos Aires - Argentina
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