uploadify não cadastra no diretorio mas salva no banco

<?php
if (!empty($_FILES)) {
	$postId = $_POST['postId'];
 $img = $_FILES['Filedata']['name'];
	$ext = substr($img, -4);
	$img = $postId.'-'.md5(uniqid(time())).$ext;
	$targetPath = $_SERVER['DOCUMENT_ROOT'].$_REQUEST['folder'].'/';
	$m = date('m');
	$y = date('Y');
	if(!file_exists($targetPath.$y)){ mkdir($targetPath.$y,0755);}
	if(!file_exists($targetPath.$y.'/'.$m)){ mkdir($targetPath.$y.'/'.$m,0755);}
	$targetPath = $_SERVER['DOCUMENT_ROOT'].$_REQUEST['folder'].'/'.$y.'/'.$m.'/';
	$tempFile = $_FILES['Filedata']['tmp_name'];
	$targetFile = str_replace('//','/',$targetPath).$img;

 $imgCad = $y.'/'.$m.'/'.$img;
 $timestamp = date('y-m-d H:i:s');
 $cadastra = mysql_query("INSERT INTO up_posts_gb(post_id, img, data) VALUES('$postId', '$imgCad', '$timestamp')");
}

	move_uploaded_file($tempFile,$targetFile);
	str_replace($_SERVER['DOCUMENT_ROOT'],'',$targetFile);

	$imgsize = getimagesize($targetFile);
	switch(strtolower(substr($targetFile, -3))){
 case "jpg":
 $image = imagecreatefromjpeg($targetFile);
 break;
 case "png":
 $image = imagecreatefrompng($targetFile);
 break;
 case "gif":
 $image = imagecreatefromgif($targetFile);
 break;
 default:
 exit;
 break;
	}

	$width = 800;
	$height = $imgsize[1]/$imgsize[0]*$width;

	$src_w = $imgsize[0];
	$src_h = $imgsize[1];

	$picture = imagecreatetruecolor($width, $height);
	imagealphablending($picture, false);
	imagesavealpha($picture, true);
	$bool = imagecopyresampled($picture, $image, 0, 0, 0, 0, $width, $height, $src_w, $src_h);

	if($bool){
 switch(strtolower(substr($targetFile, -3))){
 case "jpg":
 header("Content-Type: image/jpeg");
 $bool2 = imagejpeg($picture,$targetPath.$img,100);
 break;
 case "png":
 header("Content-Type: image/png");
 imagepng($picture,$targetPath.$img);
 break;
 case "gif":
 header("Content-Type: image/gif");
 imagegif($picture,$targetPath.$img);
 break;
 }
	}

 imagedestroy($picture);
 imagedestroy($image);
 echo '1';
?>

uploadify.php

nao aparece erro nehum e salva no banco mas nao cria o diretorio nem cadastra as imagens.

o erro está nesta linha como posso fazer para substituir

$targetPath = $_SERVER['DOCUMENT_ROOT'].$_REQUEST['folder'].'/';
ele nao está a pegar

$targetPath = $_SERVER['DOCUMENT_ROOT'].$_REQUEST['folder'].'/'.$y.'/'.$m.'/';

$_SERVER['DOCUMENT_ROOT'].$_REQUEST['folder']

jsc.php

<link href="js/uploadify/uploadify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="js/uploadify/swfobject.js"></script>
<script type="text/javascript" src="js/uploadify/jquery.uploadify.v2.1.4.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
 $('#file_upload').uploadify({
 'uploader' : 'js/uploadify/uploadify.swf',
 'script' : 'js/uploadify/uploadify.php',
 'cancelImg' : 'js/uploadify/cancel.png',
 'folder' : '../uploads',
 'multi' : true,
	'auto' : false,
 'fileExt' : '*.jpg;*.gif;*.png',
 'buttonText' : 'Selecione quantas imagens quiser (jpg, png e gif)',
 'width' : 560,
	'height' : 35,
 'scriptData' : {'postId':'<?php echo $postid;?>'},
	'onAllComplete' : function(event,data) {
 location.reload(true);
 }
 });
});
</script>