[มือใหม่ php]รบกวนช่วยตรวจสอบทีค้าบบบบบบ ผมผิดตรงไหน

<meta http-equiv=Content-Type content="text/html; charset=utf-8">
<?php
$hostname="localhost";
$user="root";
$password="1234";
$dbname="project";
$tbname="member";
mysql_connect($hostname,$user,$password) or die("Not Connection Mysql");
mysql_select_db($dbname) or die("Not Select Date Base");
mysql_query("SET character_set_results=utf8");
mysql_query("SET character_set_client=utf8");
mysql_query("SET character_set_connection=utf8");
if($_POST['username']==""){
			echo "<script language='javascript'>";
			echo "alert('กรุณาระบุชื่อผู้ใช้งาน');";
			echo "</script>";
			echo "<meta http-equiv='refresh' content='0;url=register2.php'>";	
}
else if($_POST['password']==""){
			echo "<script language='javascript'>";
			echo "alert('กรุณาระบุรหัสผ่าน');";
			echo "</script>";
			echo "<meta http-equiv='refresh' content='0;url=register2.php'>";

}
else{
$sql_insert = sprintf("INSERT INTO member (username,password,id_alumnis,status,perfix,name,lastname,nickname,address,email,tel,tel2,end,present
	,study_location,study_faculty,study_branch,study_year,study_money,study_location2,study_faculty2,study_branch2,study_year2,study_money2,award_name
	,award_institation,award_year,name_dad,lastname_dad,address_dad,tel_dad,tel2_dad,name_mom,lastname_mom,address_mom,tel_mom,tel2_mom,work,position
	,work_location,tel_work,fax_work,present) 
VALUES('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s'
	,'%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",$_POST['username'],$_POST['password'],$_POST['id_alumnis'],$_POST['status'],$_POST['perfix'],$_POST['name'],$_POST['lastname'],$_POST['nickname'],$_POST['address']
,$_POST['email'],$_POST['tel'],$_POST['tel2'],$_POST['end'],$_POST['present'],$_POST['study_location'],$_POST['study_faculty'],$_POST['study_branch']
,$_POST['study_year'],$_POST['study_money'],$_POST['study_location2'],$_POST['study_faculty2'],$_POST['study_branch2'],$_POST['study_year2'],$_POST['study_money2']
,$_POST['award_name'],$_POST['award_institation'],$_POST['award_year'],$_POST['name_dad'],$_POST['lastname_dad'],$_POST['address_dad'],$_POST['tel_dad']
,$_POST['tel2_dad'],$_POST['name_mom'],$_POST['lastname_mom'],$_POST['address_mom'],$_POST['tel_mom'],$_POST['tel2_mom'],$_POST['work'],$_POST['position']
,$_POST['work_location'],$_POST['tel_work'],$_POST['fax_work'],$_POST['present']);
  //echo $sql_insert;
$result=mysql_db_query($dbname,$sql_insert);	
if(!$result){ 
echo "<script type='text/javascript'>alert('การสมัครสมาชิกล้มเหลวกรุณาติดต่อผู้ดูแลระบบ')</script>";
echo "<meta http-equiv='refresh' content='0;url=register2.php'>";
}else{
echo"<script type='text/javascript'>alert('การสมัครสมาชิกเสร็จสิ้นเรียบร้อยระบบกำลังพาท่านกลับสู่หน้าหลัก')</script>";
echo "<meta http-equiv='refresh' content='0;url=homepage.php'>";
}		
}
?>