งงครับ ตอนแรกโค้ดมันก็ทำงานได้ อยู่ๆ มันก็ทำงานไม่ได้เฉยเลย

<?
$room_type=$_POST["room_type"];
$room_size=$_POST["room_size"];
$price_month=$_POST["price_month"];
$room_furniture=$_POST["room_furniture"];
$room_detail=$_POST["room_detail"];
$picture = $_FILES["picture"];

if(copy($_FILES["picture"]["tmp_name"],"images/".$_FILES["picture"]["name"]))
	{

require("mysql.inc.php");

$sql="insert into room (room_type, room_size,  price_month, room_furniture, room_detail, picture) values ('$room_type', '$room_size', '$price_month', '$room_furniture', '$room_detail',' ".$_FILES["picture"]["name"]." ')";

mysql_query($sql);
mysql_close($link);
}
header("location:room_insert.php");
?>