[OpenLayers-Users] Mapserver untiled problem

[Saka Royban]

Hi all. 
I'm gonna use a mapserver untiled layer but the result just fills heart of 
produced image and near borders it is filled by background color. this is 
javascript code:
        function init(){
            map = new OpenLayers.Map("map");
                        layer = new OpenLayers.Layer.MapServer( "World Map",
                        "http://localhost/cgi-bin/mapserv.exe", {map: 
'/ms4w/apps/ms101/htdocs/ms101.map'},                                 
{singleTile: true} );
                         layer.ratio=1;
                        map.addLayer(layer);
                        map.zoomToMaxExtent();
        }

It sounds the problem is with extent because FireBug shows:
imgext-281.25 -140.625 281.25 140.625

mapext-281.25 -140.625 281.25 140.625 
 
while my mapfile is as follows:
MAP
  NAME           "MS101"
  EXTENT        -180 -90 180 90 # Geographic
  SIZE           800 400
  IMAGECOLOR     128 128 255
  SHAPEPATH '../data'
    FONTSET '../fonts/fonts.list'
    
    IMAGETYPE png24
  PROJECTION
        "init=epsg:4326"
    END    
 LEGEND
    STATUS       on
    LABEL
      TYPE       TRUETYPE
      FONT       vera_sans
      COLOR      0 0 0
      SIZE       8
      ANTIALIAS  TRUE
    END
  END

    LAYER # World polygon classified by continents begins here
    NAME         continents
    DATA         'shapefile/Countries_area'
    STATUS       default
    TYPE         POLYGON
    PROJECTION
      "init=epsg:4326"
    END


    CLASSITEM    'NA3DESC'
    LABELITEM    'NA3DESC'
    CLASS
      NAME       'Africa'
      EXPRESSION 'Africa'
      STYLE
        COLOR    255 128 128
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     12
        ANTIALIAS TRUE
        POSITION CC
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
    CLASS
      NAME       'Antarctica'
      EXPRESSION /Antarctic./ #'Antarctic Area'
      STYLE
        COLOR    128 255 128
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     10
        ANTIALIAS TRUE
        POSITION CC
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
    CLASS
      NAME       'Asia'
      EXPRESSION 'Asia'
      STYLE
        COLOR    0 0 255
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     10
        ANTIALIAS TRUE
        POSITION auto
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
    CLASS
      NAME       'Oceania'
      EXPRESSION /Australia*/ #'Australian Area'
      STYLE
        COLOR    255 255 128
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     10
        ANTIALIAS TRUE
        POSITION CC
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
    CLASS
      NAME       'Europe'
      EXPRESSION 'Europe'
      STYLE
        COLOR    255 128 255
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     10
        ANTIALIAS TRUE
        POSITION CC
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
    CLASS
      NAME       'North America'
      EXPRESSION 'North America'
      STYLE
        COLOR    128 255 255
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     10
        ANTIALIAS TRUE
        POSITION CC
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
    CLASS
      NAME       'South America'
      EXPRESSION 'South America'
      STYLE
        COLOR    255 192 96
      END
      LABEL
        COLOR    64 64 64
        OUTLINECOLOR 212 212 212
        TYPE     TRUETYPE
        FONT     vera_sans-bold-italic
        SIZE     10
        ANTIALIAS TRUE
        POSITION CC
        PARTIALS FALSE
        MINDISTANCE 250
        BUFFER   4
      END
    END
  END # World polygon classified by continents ends here

    LAYER # World polygon layer begins here
    NAME         world_poly
    GROUP        world
    DATA         'shapefile/Countries_area.shp'
    STATUS       ON
    TYPE         LINE
    PROJECTION
      "init=epsg:4326"
    END

    CLASS
      NAME       'The World'
      STYLE
        COLOR    220 220 220
      END
    END
  END # World polygon layer ends here
      
END
 

Thanks in advance
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