How do I change sound volume using a sliderbar?

I need to change the volume of the game (Music and sound effects).

Problem is whenever I try to change the slider, nothing happens.

I also debugged the slider value and it is alright, which keeps me thinking what is wrong?

Here is the event:

Sound only goes down, not up, so your value needs to be between 0 and some negative number (start with -60).

Ok, now I have a new problem.

The sound does not go low enough. How can I make it to be completely removed?

Edit: use a larger number (-100), or just check for a low value (-100) and Stop the sound.

Ok found it. Thanks!