Not able to install display driver in Ubuntu

Hello,
I try to install a display driver on Ubuntu, an error occurs. An error message says that it cannot enable the package Xorg-driver-fglrx. Here below is the screenshot of the error message for your reference.
Could any expert help me to solve this error please?
Thanks in advance.
Have a nice day.

The software source for the package
xorg-driver-fglrx
Is not enabled.
