Error with session

[eluser]Peng Kong[/eluser]
1) Erm... for "MhClass.php" I don't think you can extend controller in your library folder.
Your controllers have to be in your controller folder!

2) Message: Undefined property: MhClass::$session
Filename: libraries/MhClass.php
Line Number: 19

You getting that because of (1) else check if you autoload ("core\application\config\autoload.php")
$autoload['libraries'] = array('database');