Flash builder 4.6，php和mysqli数据库没有使用数据更新，而是返回insert_id数据库仅显示空

EmployeeServiceg类连接到mysql数据库。我可以从数据库中检索数据，但插入语句有困难，因为auto_id返回新的 persid，但所有其他数据库列中只有空值。

提前谢谢。

class EmployeeServiceg{ 
  var $username = "root"; 
  var $password = ""; 
  var $server = "localhost"; 
  var $port = "3306"; 
  var $databasename = "hg"; 
  var $tablename = "employees"; 
  var $connection; 
  public function __construct() { 
    $this->connection = mysqli_connect( 
                   $this->server,  
                   $this->username,  
                   $this->password, 
                   $this->databasename, 
                   $this->port 
                   ); 
   $this->throwExceptionOnError($this->connection); 
  }  
  public function createEmployee($item) {
    $stmt = mysqli_prepare($this->connection,
        "INSERT INTO employees (name, surname, title, cellphone, email,
                streetno, street, city, employeeno, idno) 
    VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
    $this->throwExceptionOnError();

    mysqli_bind_param($stmt,'ssssssssss', $row->name, $row->surname, $row->title,
        $row->cellphone, $row->email, $row->streetno, $row->street, $row->city,
        $row->employeeno, $row->idno);

    $this->throwExceptionOnError();

    mysqli_stmt_execute($stmt);
    $this->throwExceptionOnError();

    $autoid = mysqli_stmt_insert_id($stmt);

    mysqli_stmt_free_result($stmt);
    mysqli_close($this->connection);
    return $autoid;
  }