kenapa data tidak masuk ke database

Assalamualaikum teman teman sekolah koding, saya ada problem input database, kenapa ketika saya sudah inputkan datanya tetapi data tersebut tidak masuk ke database? mohon bantuannya

register.php

 <div id="container-user-akses">

	<form action="<?php BASE_URL."proses_register.php";?>" method="POST">

		<div class="element-form">
		<label>Nama Lengkap</label>
		<span><input type="text" name="nama_lengkap"/></span>
		</div>

		<div class="element-form">
		<label>Email</label>
		<span><input type="text" name="email"/></span>
		</div>

		<div class="element-form">
		<label>Nomor Telepon</label>
		<span><input type="text" name="phone"/></span>
		</div>

		<div class="element-form">
		<label>Alamat</label>
		<span><textarea name="alamat"></textarea></span>
		</div>

		<div class="element-form">
		<label>password</label>
		<span><input type="password" name="password"/></span>
		</div>

		<div class="element-form">
		<label>Re-type Password</label>
		<span><input type="password" name="re_password"/></span>
		</div>

		<div class="element-form">
		<span><input type="submit" value="register"/></span>
		</div>

</div>

koneksi.php

 <?php

	$server = "localhost";
	$username = "root";
	$password = "";
	$database = "weshop";

	$koneksi = mysqli_connect ($server, $username, $password, $database) or die ("koneksi ke database gagal");

proses_register.php

 <?php

	include_once("function/koneksi.php");
	include_once("function/helper.php");

	$level = "customer";
	$status = "on";
	$nama_lengkap = $_POST['nama_lengkap'];
	$email = $_POST['email'];
	$phone = $_POST['phone'];
	$alamat = $_POST['alamat'];
	$password = md5($_POST['password']);
	$re_password = $_POST['re_password'];

	mysqli_query ($koneksi, "INSERT INTO user (level, nama, email, alamat, phone, password, status)
VALUES ('$level','$nama_lengkap','$email','$alamat','$phone','$password','$status')");

			?>