I go into /etc/rc.conf to change the desktop thing to kde-3.5 or gnome or whatever. (It's currently fluxbox and i want it to be kde-3.5). I've already done the prior steps to make it work, but when i change it to kde-3.5 and hit save, it says error writing /etc/rc.conf: read only file system. If I try to edit anything it says this. and when i run the /etc/rc.conf i do type -w to make it writable, but it still doesnt work. please give me a solution.