Password Trouble

[eluser]Bart v B[/eluser]
?? don't know what voodo there must be.. Only md5()

Code:

$user_profile = array(
'username'=> $this->input->post('reg_username'),
'password' => md5($this->input->post('reg_password')),
'email' => $this->input->post('email')
);

And it's done..