Configuring composite output

Hi, It’s been awhile since I configured 2 of my ATV’s to composite and Component
and now want to configure another one.
I have logged in via locally, with PuTTy, and WinSCP.
Login is successful but when i enter " /etc/X11/xorg.conf "
I get "ACCESS DENIED "
It worked a year or two ago ? Any suggestions , please.
Thanks.