Raster layers from PNG + .wld file

[Stephen Davies]

G'day all.

I have been successful in using ECW files as raster layers but am now 
trying to use a PNG file plus a .wld file with blank results.

My test map file looks like this:
MAP
  NAME test
   
    EXTENT 735810 8454630 742810 8461630
    PROJECTION
       "init=epsg:28352"
    END

    SIZE 600 600
    FONTSET "/usr/local/apache2/htdocs/benparts/fonts.list"
    SYMBOLSET "/usr/local/apache2/htdocs/benparts/symbols"
    UNITS METERS
    IMAGETYPE  png24
    IMAGECOLOR 255 255 255

    WEB
	template /usr/local/apache2/htdocs/benparts/templates/test1.html
	imagepath "/usr/local/apache2/htdocs/tmp/"
	imageurl  "/tmp/"
    END

    LAYER
      TYPE RASTER
      NAME "bkgrnd"
      STATUS DEFAULT
      PROJECTION
       "init=epsg:28352"
      END
      DATA "/usr/local/apache2/htdocs/benparts/rasters/dd1.png"
      PROCESSING "DITHER=YES"
    END
END

My dd1.wld file looks like:

2.1
0.0000000000
0.0000000000
-2.1
746046.00
8450252.00

The URL:

http://www.sdc.com.au/cgi-bin/mapserv?map=/tmp/test.map

gives no errors and an empty display.

What am I doing wrong?

Cheers and thanks,
Stephen Davies
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