Insert บนเครื่องตัวเองทำได้ แต่พอ Insert บนเซิฟเวอร์ไม่ได้ครับ

<?php 
session_start();
	mysql_connect("localhost","db_service","1234");
	mysql_select_db("db_service");

 $RoomNumber = $_POST['ddlRoomNumber'];
  $RegisCode = $_POST['txtRegisCode'];
$Id_Room = $_Get['Id_Room'];
$Id_Inventory = $_Get['Id_Inventory'];
$Id_Room = $_POST['Id_Room'];
$Id_Inventory = $_POST['Id_Inventory'];


 $strSQL = " select room.RoomNumber,inventory.RegisCode,room.Id_Room,inventory.Id_Inventory
from room,inventory
where RoomNumber = '".mysql_real_escape_string( $RoomNumber)."' and RegisCode = '".mysql_real_escape_string( $RegisCode)."'";
	$objQuery = mysql_query($strSQL);
$objResult = mysql_fetch_array($objQuery);

	if(trim($_POST["txtdatepick2"]) == "")
	{
		echo "กรุณาระบุวันที่ติดตั้ง";
		exit();	

	}
	if(trim($_POST["txtInstallers"]) == "")
	{
		echo "กรุณาระบุผู้ติดตั้ง";
		exit();	

	}

	else
	{
	
			$_SESSION["Id_Room"] = $objResult["Id_Room"];
			$_SESSION["Id_Inventory"] = $objResult["Id_Inventory"];
	}

		$strSQL1 = "INSERT INTO list (Id_Room,Id_Inventory,RegisCode,InstallationDate,Installers,Note,Status_List) VALUES ('".$objResult["Id_Room"]."','".$objResult["Id_Inventory"]."','".$_POST["txtRegisCode"]."','".$_POST["txtdatepick2"]."','".$_POST["txtInstallers"]."','".$_POST["txtNote"]."','".$_POST["ddlStatus"]."')";
		$objQuery1 = mysql_query($strSQL1);	
		
	
	echo "บันทึกสำเร็จ<br>";		
	echo $objResult["Id_Room"],$objResult["Id_Inventory"],$_POST["txtRegisCode"],$_POST["txtdatepick2"],$_POST["txtInstallers"],$_POST["txtNote"],$_POST["ddlStatus"];
		

	mysql_close();
	session_write_close();
?>
<meta http-equiv=refresh content=10;URL='addList.php'>