use my form it works and just edit it!!...
<form action="/login/login.php" method="post" name="login">
Username:<br>
<input class="inputSidebar" type="text" name="username"<br>
Password:<br>
<input class="inputSidebar" type="password" name="password"><br>
<input class="button" type="submit" name="submit" value="Log in">
</form>
If you can give me a more towork on it woulde help sow i know what you wanna do and what the error is??