note 16419 added to function.imagecreatefromjpeg

When i implement one of the above listed functions i get an error telling me that header information cannot be sent because it already has been sent. Why is this. The image is outputted as a load of ascii. How do i create an image. -- http://www.php.net/manual/en/function.imagecreatefromjpeg.php http://master.php.net/manage/user-notes.php?action=edit+16419 http://master.php.net/manage/user-notes.php?action=delete+16419 http://master.php.net/manage/user-notes.php?action=reject+16419