ใช้ อินคู้ด ไม่ได้ครับ ช่วยดูโค้ดทีครับ งงมากกกกกกกกกกก

<?
	mysql_connect("localhost","root","1234");
	mysql_select_db("projectblack");
	if(trim($_POST["txtUsername"]) == "")
	{
		echo "Please input Username!";
		print "<meta http-equiv=refresh content=2;URL=signup.php>"; 
		exit();	
	}
	
	if(trim($_POST["txtPassword"]) == "")
	{
		echo "Please input Password!";
		print "<meta http-equiv=refresh content=2;URL=signup.php>";
		exit();	s
	}	
		
	if($_POST["txtPassword"] != $_POST["txtConPassword"])
	{
		echo "Password not Match!";
		print "<meta http-equiv=refresh content=2;URL=signup.php>"; 
		exit();
	}
	
	if(trim($_POST["txtName"]) == "")
	{
		echo "Please input Name!";
		print "<meta http-equiv=refresh content=2;URL=signup.php>";
		exit();	
	}	
	
	$strSQL = "SELECT * FROM signup WHERE Username = '".trim($_POST['txtUsername'])."' ";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if($objResult)
	{
			echo "Username already exists!";
	}
	else
	{	
		
		$strSQL = "INSERT INTO signup (Username,Password,Name,Status) VALUES ('".$_POST["txtUsername"]."', 
		'".$_POST["txtPassword"]."','".$_POST["txtName"]."','".$_POST["Status"]."')";
		$objQuery = mysql_query($strSQL);
		
		echo "Register Completed!<br>";		
		print "<meta http-equiv=refresh content=1;URL=signup.php>"; 
		//echo "<br> Go to <a href='login1.php'>Login page</a>";
		
	}

	mysql_close();
?>

$objResult = mysql_fetch_array($objQuery);