ช่วยดูให้ทีครับ คือผมลองทดสอบเครื่องผมสามารถรันตรวจสอบรหัสได้ถูกต้อง แต่พออัพลงโฮสมันไม่ได้อะครับ

<?php
session_start();

$user = $_POST['username'];
$pass = $_POST['password'];

require_once 'lib/configdb.inc';
require_once 'adodb5/adodb.inc.php';
require_once 'adodb5/drivers/adodb-mysql.inc.php';
require_once 'lib/connectdb.inc.php';




$rs = $conn->Execute("select * from users where username ='$user'  and pass='$pass' "); 


if($rs->RecordCount()<=0) {
      $data['success'] = 0;
      $data['message'] = "You can't access";
	
}	
else { 
      $data['success'] = 1;
        
     
      $data['message'] = "You are Admin.";
	  $_SESSION['user'] = $user;
	  
	   $id = $rs->fields["user_id"];
	   
	  
	  $rs = $conn->Execute("select * from student where  user_id='$id'"); 
     
      if($rs->RecordCount()<=0) {
		       $rs = $conn->Execute("select * from teacher where  user_id='$id'"); 
             
				     if($rs->RecordCount()<=0) {
						 
						$rs = $conn->Execute("select * from admin where  user_id='$id'"); 
                     
						   if($rs->RecordCount()<=0)
						    {
							}
							 else
					        {
						     
		 				   
		 				          $_SESSION['author'] = "admin";
		  				         $_SESSION['name'] = $rs->fields['name'];
	 			 		           $_SESSION['surname'] = $rs->fields['surname'];
					          }
						 
					 }
					 else
					 {
					
		 				
		 				 $_SESSION['author'] = "teacher";
		  				 $_SESSION['name'] = $rs->fields['name'];
	 			 		 $_SESSION['surname'] = $rs->fields['surname'];
					 }
		  
		  
	  }
	  else
	  {
		
		
		  $_SESSION['author'] = "student";
		   $_SESSION['name'] = $rs->fields['name'];
	 			  $_SESSION['surname'] = $rs->fields['surname'];
			
				
	  }
	 
	   
	   
	   

}
   echo json_encode($data);	
?>