อัพโหลดไฟล์ไม่ได้ ERROR : move_uploaded_file แก้ยังไงดี ??

<? if($_POST['u']==1)
	{	
		
	if($_FILES["ImageFile"]["name"] != "")
	{
		if(move_uploaded_file($_FILES["ImageFile"]["tmp_name"],"../images/product/".$_POST["type"]."/".$_FILES["ImageFile"]["name"]))
		{

			//*** Delete Old File ***//			
			@unlink("../images/product/".$_POST["type"]."/".$_POST["hdnOldFile"]);
			
			//*** Update New File ***//
			include '../config.php';
			$strSQL = "UPDATE product ";
			$strSQL .=" SET product_name = '".$_POST['name']."',product_price = '".$_POST["price"]."',product_band = '".$_POST["band"]."',product_type = '".$_POST["type"]."',product_detail = '".$_POST["detail"]."',product_picture = '".$_FILES["ImageFile"]["name"]."' WHERE product_id = '".$_POST["id"]."' ";
			$objQuery = mysql_query($strSQL);
					
			?>
			<script>		
     window.setTimeout('window.location="product_edit.php?show=บันทึกสำเร็จ&id=<? echo $_POST['id'];?>&num=1"; ',0); </script> <?
		}							
	 } 
	 else 
	 {
		include '../config.php';
			$strSQL = "UPDATE product ";
			$strSQL .=" SET product_name = '".$_POST['name']."',product_price = '".$_POST["price"]."',product_band = '".$_POST["band"]."',product_type = '".$_POST["type"]."',product_detail = '".$_POST["detail"]."' WHERE product_id = '".$_POST["id"]."' ";
			$objQuery = mysql_query($strSQL);
		if($objQuery){?>
	<script>		
     window.setTimeout('window.location="product_edit.php?show=บันทึกสำเร็จ&id=<? echo $_POST['id'];?>&num=<?= $_POST['num'];?>&back=<?= $_POST['back'];?>"; ',0); </script> <? }
	 }
	} //จบ IF
	 else 
	 {
		if($_FILES["ImageFile"]["name"] != "")
		{
			if(move_uploaded_file($_FILES["ImageFile"]["tmp_name"],"../images/product/".$_POST['type']."/".$_FILES["ImageFile"]["name"]))
			{ 	
				include '../config.php';
				$a = "INSERT INTO product ";
				$a .="(product_name,product_price,product_type,product_band,product_detail,product_picture) ";
				$a .="VALUES ";
				$a .="('".$_POST["name"]."','".$_POST["price"]."','".$_POST["type"]."','".$_POST["band"]."','".$_POST["detail"]."','".$_FILES["ImageFile"]["name"]."') ";	
				$b = mysql_query($a);
				if($b)
				{ ?>		
					<script>	
     				window.setTimeout('window.location="product.php?show=เพิ่มสินค้าสำเร็จ"; ',0); </script>				
 				<? }
				else
				{ ?> 
					<script>		
     				window.setTimeout('window.location="product_edit.php?error="เพิ่มสินค้าไม่สำเร็จ กรุณาเพิ่มรูปสินค้า"&num=2"; ',0); </script>
				<?	}
	   		} 
		} 
		else 
		{ ?> 
        	<p style="font-size:1.5em">กรุณาเพิ่มรูปภาพบทความ</p>
			<script>		
     		window.setTimeout('window.location="<?= $_POST['return_url'];?>"; ',1000); </script> 
	<? 	} 
	} ?>