Dynamically Created Button Click Event

hi,
I'm creating some buttons say Category buttons Dynamically, i'm Adding new Click event to that Busttons,
When i Clcik on Category button i have to Create Process Buttons, For the Frist time i'm calling this method in
page_Init so not getting any Probelm, after that i have to load Activity Buttons in Process Button Click Event,
But this Click event is not firing because of view state of the control is not saved after post back for dynamically
created controls. will u any one help in this context.

Thanks and Regards,
Mallika.