C-Sharp (C#) Group: My Page Load Event Is Firing More Then Once

Can anyone tell me why my page load event is firing more
then once? I
have a asp.net 2.0 page with four user controls and it seems
that the
user controls are loading but the page load event seems to
be firing
either for each control that is  loaded or it just seems to
be firing
off more then it should on a the page load.