how to use the class.upload.php as a library?

[eluser]Patrikk[/eluser]
Hi everyone,

my first post here and I would also like to use the class.upload instead of the built in one.

Ive been reading this thread but need some more help to pull this off.
Ive done the following:

* added the class.upload in libraries folder.

* made a controller called upload and a view called upload also.

* loaded the class.upoload in the controller like it was suggested here
( $this->load->library('class.upload'); )

My problem is:
I get the following error message: Fatal error: Cannot redeclare class upload in ...\system\application\libraries\class.upload.php on line 550

what am I missing as very new with CI so I need help from the experts on this forum.

thx all help that I get