PHP does not work - HTTP Error 500 Internal server

Hello, I have problems with websites that use php. These do not work. I have to configure something special in my plans for Unix?

I’m sorry for my english. I speak spanish.

Example : http://www.colegio-juanpabloii.edu.bo/adm_profe.php
HTTP Error 500 Internal server error.

Thank you.

Hello,

Have you submitted a ticket regarding this?