[SOLVED #7] Loading libraries works on desktop, but not on server.

Hi all,
thank you for your answers.

Yes, I tried with or without upper case first / all letters.

The file are now, Tfdfp.php, and I tested like TFPDF.php.
It was the same.

Yes, I tried to put the classes at the root of libraries, and then no error, but a white page instead a PDF file.

I think, the best for now is switching to CI3.
What do you think about it ?