Scripting error

programming
1

I can’t seem to get this scripting to work. Anyone have any ideas?? I currently get the following error:
Fatal error: Call to undefined function: newmagickwand() in /home/theoldd/public_html/submit.php on line 21


if($uploadedfile_type="image/jpeg" || $uploadedfile_type="image/jpg" ){
$target = "uploads/memberspics/";
$pic = $target . ereg_replace('[^a-z0-9A-Z.]','',$username) . '.' . jpg;
move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $pic);
cmyk2rgb($target . $pic);
}
fopen("$pic", "a+");
function cmyk2rgb($pic) {
   $mgck_wnd = NewMagickWand();
   MagickReadImage($mgck_wnd, $pic);
   
   $img_colspc = MagickGetImageColorspace($mgck_wnd);
   if ($img_colspc == MW_CMYKColorspace) {
	   echo "$file was in CMYK format<br />";
	   MagickSetImageColorspace($mgck_wnd, MW_RGBColorspace);
   }
   MagickWriteImage($mgck_wnd, str_replace('.', '-rgb.', $pic));
}

is that the right function or is there something wrong with it??
Thanks!