root@piratebox:~# /etc/config/wireless: Permission denied error

Hi all
My box works fine, I'm all logged in with Putty, but...
Just stuck on this:

I get this error:
root@piratebox:~# /etc/config/wireless: Permission denied

when I typed in: /etc/config/wireless

am I in the wrong dir?
do I need some more code in front?

many thanks