Image Manipulation problem

Hi--- using :Windows XP GraphicsMagick-1.1.5

Most of the image manipulation functions like charcoal, swirl, and wave 
end up outputting mangled images for some reason that do not appear at 
all like the originial.  What would be the problem???


Image image;
  Image image(218,342,"RGB",CharPixel,splash_jpg);
  image.read(218,342,"RGB",CharPixel,splash_jpg);
   image.charcoal();  //
   image.write( "x.jpg" );



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