Cron mkdir und chmod Problem

PHP Warning:  mkdir(): No such file or directory in /var/www/vhosts/f-cam.at/httpdocs/cron_fcam03.php on line 38 PHP Warning:  chmod(): No such file or directory in /var/www/vhosts/f-cam.at/httpdocs/cron_fcam03.php on line 39 PHP Warning:  mkdir(): No such file or directory in /var/www/vhosts/f-cam.at/httpdocs/cron_fcam03.php on line 42 PHP Warning:  chmod(): No such file or directory in /var/www/vhosts/f-cam.at/httpdocs/cron_fcam03.php on line 43

<?php
// CRONJOB BUILDING THUMBS EVERY 10 MINUTES

// set cam to be supported
$baustellen = array('fahrnercam03');  
$thumb_width = 200;
$thumb_height = 150;
$thumb_quality = 75;

date_default_timezone_set('Europe/Berlin');  
function create_thumb($source='', $destination='', $width=200, $height=150, $quality=75) {  
	// create thumbnail pic and store it in  destination file
	if (!$source) die ('<b>EROR CREATING THUMBNAIL:</b> No source file given.');  
	if (!$destination) die ('<b>EROR CREATING THUMBNAIL:</b> No destination path given.');  

	$size = getimagesize($source);	// get orig size and filetype 
	if ($size[2] == 1) $img = imagecreatefromgif($source);	// image is a gif
	if ($size[2] == 2) $img = imagecreatefromjpeg($source);	// image is a jpg
	$new_img = imagecreatetruecolor($width, $height);
	imagecopyresampled($new_img, $img, 0, 0, 0, 0, (int)$width, (int)$height, $size, $size[1]);
	imagedestroy($img);
	$result = imagejpeg($new_img, $destination, (int)$quality);
	imagedestroy($new_img);
	if ($result)  return true; 
	return false;
}

define ('DIR_FS', $_SERVER['DOCUMENT_ROOT'].'/'); // define base dir. It is the directory in which this file is located  
//$date = ($_GET['date']) ? trim($_GET['date']): date(Y-m-d) ;  
$date = '2013-04-08';  // zum testen  

$baustelle = $baustellen;
$camdir = DIR_FS.$baustelle.'/archiv/';  
$sourcedir = $camdir.$date;
$thumbsdir = $sourcedir.'/thumbs';  

// prüfe ob ordner FS/baustelle/archiv/datum existiert
if (!is_dir($sourcedir))  mkdir($sourcedir, 0755);
if (!is_writable($sourcedir)) chmod($sourcedir, 0755);

// prüfe ob ordner FS/baustelle/archiv/datum/thumbs existiert
if (!is_dir($thumbsdir))  mkdir($thumbsdir, 0755);
if (!is_writable($thumbsdir)) chmod($thumbsdir, 0755);

$pics = glob($sourcedir.'/'.'*.jpg'); // lese pics ein  

if ($pics) {
	foreach ($pics as $k => $orig_pic) {
		$pic = str_ireplace($sourcedir.'/', '', $orig_pic);  
		if (!file_exists($thumbsdir.'/'.$pic))  create_thumb($orig_pic, $thumbsdir.'/'.$pic, $thumb_width, $thumb_height, $thumb_quality);  
	}
}
?>