Getting PHP registration form to connect with MYSQL

I'm building a test site and my test form is working fine. But when I submit my form it says "cannot find page". What am I doing wrong?

Code:

<?php

if(isset($_POST['username']) && isset($_POST['password']))
{
$db =connect('jsnow_jsnow','missysnow2005');
if($db!=false)
{
   register($db);
   echo "User registered";
} 

}

function connect($dbuser,$dbpassword)
{
    try{
        $db = new  PDO('mysql:host=localhost;dbname=jsnow_login',$dbuser,$dbpassword);
        return $db;
    }catch(PDOException $e){
        echo $e;
        return false;}
}

function register($db)
{
    $user = mysql_real_escape_string($_POST['username']);
    $password = sha1($_POST['password']);
    $email = mysql_real_escape_string($_POST['e_mail']);

    $query = "INSERT INTO members(username,password,email) values('".$user."','".$password."','".$email."')";
    try{
        $db->eginTransaction();
        $db->exec($query);
        $db->commit();
        echo "commit succesful";
    }catch(Exception $e){}
}

?>


<!DOCTYPE html>
<html>
<head>
</head>
<body>
<form action="http://localhost/jsnow_login/registration.php" method="post">
username:<input type="text" name="username"/>
password:<input type="password" name="password"/>
email<input type="text" name="e_mail"/>
<input type="submit"/>

</form>


</body>
</html>

Can someone help me with this?