controller in side other controller

Hi 

I have a problem, can`t find solve fot them.
I have controller, name: Logon, working good. I wont use same controller in side other controller, if I code $this->load->view('Logon') I can see my formbut his don`t working. I konow why, because this view load don`t call to controller 'Logon' and don`t call model 'Logon_model' 
How I can use this controller?
Sory for my Language ;{  but I need help ;]]  THX