ใช้ mysql_fetch_array แล้วมันขึ้น Warning อะคับช่วยด้วยคับ

<?
	session_start();
	mysql_connect("localhost","root","123");
	mysql_select_db("vtsdd");
	$strSQL = "SELECT * FROM member WHERE Username = '".($_POST['txtUsername'])."' 
	and Password = '".($_POST['txtPassword'])."'";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if(!$objResult)
	{
			echo "Username and Password Incorrect!";
	}
	else
	{
			$_SESSION["UserID"] = $objResult["UserID"];
			$_SESSION["Status"] = $objResult["Status"];

			session_write_close();
			
			if($objResult["Status"] == "1")
			{
				header("location:admin_page.php");
			}
			else
			{
				header("location:user_page.php");
			}
	}
	mysql_close();
?>

$objQuery = mysql_query($strSQL) or die( mysql_error() . "<br>\n" . $strSQL);