Authentication with CI

[eluser]lenswipe[/eluser]
Hey guys

Just looked at authentication with CI - I followed this: http://davidwinter.me/articles/2009/02/2...deigniter/

Only thing is when i submit my form it shows the login screen all the time

my form opening tag is:
<form action="http://localhost/helpdesk/sessions/login.html" method="post" accept-charset="utf-8">


Can anyone from looking at that tutorial and reading my code tell my why my controller isnt logging the user in?