Default Shutter sound option in menu doesnt work

My S5 didnt have the option to disable the shutter sound so I used to method by adding a piece of code to others.xml and adding the option in the menu of the camera.

The option is there now but it doesnt seem to do anything. It just stays on On.

Any ideas?
Thanks

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Device: Samsung Galaxy SIII GT-I9300
ROM: CyanogenMod 11 Latest nightly
Kernel: CyanogenMod Stock
Runtime: ART