Issue loading PHPExcel in Codeigniter

[Wemirrelt]

I'm trying to use PHPExcel with Codeigniter, but I'm running into issues. I extracted the class files from the PHPExcel download and placed them in the 'application/libraries' folder for Codeigniter. However when I try to load the necessary libraries:\[code\] $this->load->library('PHPExcel'); $this->load->library('PHPExcel/IOFactory');\[/code\]I get the error "Non-existent class: IOFactory".I've checked that iofactory file is in the PHPExcel file, and it is there. Am I supposed to have the classes located somewhere else? What else am I doing wrong?