methods and fields not recognized

[eluser]InsiteFX[/eluser]
For one you cannot extend any of the database stuff.

Code:

class User extends ActiveRecord\Model // <- this is totaly wrong.

if(User::validate_password($password) && $user)

$user = User::find_by_username($username); // this method doe's not exist in the model

//field session not found in class Ci_Controller
Did you load the session library?

I think you need to re-think your code.