Controlling sound from FLV

On so i have my FLV i have managed to set it on a loop so it plays over and over however i want to Mute the sound of the FLV or set the sound to 0.

I tried this on the main timeline
It didn’t work so i tried this code on the FLV itself

on (complete){

The loop/auto rewind worked perfectly however the sound still played
and idea’s?
Thanks in advance.