Image generation question

I have been trying to generate images dynamicall but I keep getting this message. Fatal error: Call to undefined function: imagecreatefrompng() in D:\wwwroot\counter\img.php on line 5 Here is my code: <?php // set up image //$height = 200; //$width = 200; $im = imagecreatefrompng("$Image1.png"); $black = ImageColorAllocate($im, 0, 0, 0); // draw string ImageString($im, 4, 15, 15, "000001", $black); // output image Header("Content-type: image/png"); ImagePNG($im); // destroy img ImageDestroy($im); ?> Matt Babineau Freelance Internet Developer e: <mailto:mbabineau@illuminatistudios.com> mbabineau@illuminatistudios.com p: 603.943.4237 w: <http://www.illuminatistudios.com/> http://www.illuminatistudios.com