[eluser]Référencement Google[/eluser]
Oops, I saw now, you are loading 2 times the image library, shoot out the 1st load that you are doing and tell me what's going on. Also try to get errors so you can know what's happend:
Code:
if ( ! $this->image_lib->resize())
{
echo $this->image_lib->display_errors();
}