ช่วยดูโค้ด PHP ใช้ AJAX เเล้วมันไม่บันทึกลง Database อะครับ

<?
	include("connect.php");
	$strUsername = trim($_POST["tUsername"]);

	if(trim($strUsername) == "")
	{
		echo "<img src='images/false.png'>";
		exit();

	}

	$strSQL = "SELECT * FROM tb_member WHERE UserName = '".$strUsername."' ";
	$objQuery = mysql_query($strSQL)  or die(mysql_error());
	$objResult = mysql_fetch_array($objQuery);
	if($objResult)
	{
			echo "<img src='images/false.png'>";
			exit();
	}
	else 
	{
			echo "<img src='images/true.png'>";
					exit();
			$sur = strrchr($_FILES['filUpload']['name'], "."); 
			$newfilename = (Date("dmy_His").$sur); 
			if(copy($_FILES["filUpload"]["tmp_name"],"myfile/".$newfilename.'.pdf'))
			{		
		mysql_query("insert into tb_member (UserName,Password,FullName,Sex,EmailAdddress,Address,tel,Agencies,Position,Pic,Status) values 			 		('$txtUsername','$txtPass','$txtname','$rdoGender','$txtemail','$editor1','$txtTel','
		$txtagencies','$txtposition','$newfilename','$select');" );
		$tb_member_UserID = mysql_insert_id();
		mysql_query("insert into tb_boss (UserID,BossName,BossAgencies,BossPosition,BossEmail,BossTel) values 
		( '$tb_member_UserID','$txtname','$txtagencies','$txtposition','$txtemail','$txtTel')");

			echo "<script>alert('Register Completed!');
					window.location='Login.php'; 
					</script>";	
			}	
	}
	mysql_close();
?>

<?php
	include("connect.php");
	$strUsername = trim($_POST["tUsername"]);

	if(trim($strUsername) == "")
	{
		echo "<img src='images/false.png'>";
		exit();
	}

	$strSQL = "SELECT * FROM tb_member WHERE UserName = '".$strUsername."' ";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if($objResult)
	{
		/*
			return ค่า แล้วค่อยแสดงรูปน่าจะดีกว่านะครับ
		*/
			echo "<img src='images/false.png'>";
	}
	else
	{
			echo "<img src='images/true.png'>";
		if(move_uploaded_file($_FILES["filUpload"]["tmp_name"],"myfile/".$_FILES["filUpload"]["name"]))
		{	
		$sql=" INSERT INTO tb_member (UserName, Password, FullName, Sex, EmailAdddress, Address, tel, Agencies, Position, Pic, Status) ";
		$sql.=" VALUES ";
		$sql.=" ('".$txtUsername."', '".$txtPass."', '".$txtname."', '".$rdoGender."', '".$txtemail."', '".$editor1."', '".$txtTel."', '".$txtagencies."', '".$txtposition."', '".$_FILES["filUpload"]["name"]."', '".$select."') "; 
		$qr=mysql_query($sql) or die (mysql_error());
		
		$tb_member_UserID = mysql_insert_id();
		
		$sql1=" INSERT INTO tb_boss ( UserID, BossName, BossAgencies, BossPosition, BossEmail ) ";
		$sql1.=" VALUES ";
		$sql1.=" ('".$tb_member_UserID."', '".$txtname."', '".$txtagencies."', '".$txtposition."', '".$txtemail."') ";
		$qr1=mysql_query($sql1) or die (mysql_error());
		
		/*
			ถ้าใช้ ajax return ค่าแล้วค่อย alert น่าจะดีกว่านะครับ
			echo "<script>alert('Register Completed!'); ";
			echo "window.location='Login.php'";	 
			echo "</script>";
		*/
			
		}
	}
/*
	$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
	
	mysql_close(); --> false
	mysql_close($link); --> true
*/
	
?>