Add User Script Werkt Niet

ik heb dit script geschreven om users toe te voegen hoe het geschreven is zou het moeten werken maar om de een of andere reden doet dat het niet
wat denken jullie?

<?php
if(isset($_POST['submit'])){

include("database/connect.inc");
$user1 = $_POST['user'];
$pass1 = $_POST['pass'];
$pass1 = md5($pass1);
$email = $_POST['email'];
$birth = $_POST['birth'];
$city = $_POST['city'];
$brand = $_POST['brand'];
$type = $_POST['type'];
$gender = $_POST['gender'];
$result = mysql_query("INSERT INTO TNO (user,pass,email,birth,city,brand,type,gender) VALUES ('".$user1."','".$pass1.",'".$email."','".$birth."','".$city."','".$brand."','".$type."','".$gender."');");
if($result == 0){
echo 'The User Was Not Added,<br> Please Try Again!<br>';
}
else
{
echo 'You Where Succesfully Added To The Database!<br>';
}
}
else
{
echo '<div align="center">
<form action="" method="POST" enctype="text/plain" >
User Details<br><br>
User Account: <input type="text" size="10" name="user" />(15 characters max.)<br>
Password: <input type="password" size="10" name="pass" />(10 characters max.)<br>
Email: <input type="text" size="25" name="email" />(30 characters max.)<br><br>
City: <input type="text" size="10" name="city" />(25 characters max.)<br>
Date Of Birth: <input type="text" size="10" name="birth" />(**/**/**** in this format)<br>
Gender: <input type="text" size="10" name="gender" />(10 characters max.)<br><br>
Car Details<br><br>
Brand Of Car: <input type="text" size="20" name="brand" />(15 characters max.)<br>
Type Of Brand: <input type="text" size="25" name="type" />(25 characters max.)<br><br>
<input type="submit" value="Submit" name="submit" /><br>
</form>
</div>';
}
?>