PulseAudio problems

[SilverFrost]

Today i installed PulseAudio but when i was about to configure it through Firestarter while looking at: https://wiki.ubuntu.com/PulseAudio

I gave this commands:

gksudo gedit /etc/firestarter/user-pre

and an empty file came up. Then i added this lines:

$IPT -A INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT
$IPT -A OUTPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT

But when i was about to save the file with this two lines in it, it first said that the file was already there and asked if i wanted to replace it then i clicked on Replace. Then a rong message came up and said:

Could not save the file /etc/firestarter/user-pre.
You are try to save the file on a write protected disk. Look if you gave the place right and try again.

It doesnt work to save this file? How do i save it?

[SilverFrost]

Or i should uninstall Firestarter?
Said:

If you have firestarter installed, it *WILL* stop PulseAudio from properly communicating over Zeroconf/Avahi's port 5353.

On the PulseAudio wiki. Wich would end up in Firestarter blocking PulseAudio...

[edvar]

Run 'sudo chmod u+w /etc/firestarter/user-pre' to turn the file writable, do the changes, save the file and then run'sudo chmod u-w /etc/firestarter/user-pre' to turn the file read-only again.