cc.audioEngine.setEffectsVolume() not working in win32

cc.audioEngine.setEffectsVolume() not working in win32
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#1

Im trying to decrease or increase volume of a sound effect but after setting the effect volume to 0.0 it is still returning the value 1.0 in cc.audioEngine.getEffectsVolume();
what could be the reason for this?

Need help please reply,
thanks