imagecreatefromjpeg() werkt niet PHP Version 5.2.16

Mijn onderstaande script werkt niet op nieuwe server. Volgend log moet het liggen aan: imagecreatefromjpeg()

Iemand een idee wat er mis gaat. Bestanden tot 1 mb doen het overigens wel.


groeten,

Michiel

<?
//Resize picture
function resize_picture ($remote_file, $image_source ) {

// some settings
$max_upload_width = 600;

$max_upload_height = 600;


imagejpeg($image_source,$remote_file,100);
chmod($remote_file,0644);


/******* GROOT FORMAAT AANPASSEN *******/
// get width and height of original image
list($image_width, $image_height) = getimagesize($remote_file);

if($image_width>$max_upload_width || $image_height >$max_upload_height){
$proportions = $image_width/$image_height;

if($image_width>$image_height){
$new_width = $max_upload_width;
$new_height = round($max_upload_width/$proportions);
}
else{
$new_height = $max_upload_height;
$new_width = round($max_upload_height*$proportions);
}


$new_image = imagecreatetruecolor($new_width , $new_height);
$image_source = imagecreatefromjpeg($remote_file);

imagecopyresampled($new_image, $image_source, 0, 0, 0, 0, $new_width, $new_height, $image_width, $image_height);

// Save the image as 'simpletext.jpg'
imagejpeg($new_image,$remote_file,100);

// Free up memory
imagedestroy($new_image);


}
/** END GROOT FORMAAT **/

imagedestroy($image_source);

}
?>