Microphone.getEnhancedMicrophone() sets my OS audio volume to 66

Hi,

when I execute method Microphone.getEnhancedMicrophone() it sets my OS audio volume to 66, I think that the reason is that getEnhancedMicrophone() has default value for autogain true, its sets volume to 66 and I can't really start using Microphone without my OS volume modification. I don't want to use autogain so I set it's value "false" but that is too late because autogain first was set to "true".

Example:

var  mic:Microphone = Microphone.getEnhancedMicrophone();//sets my OS volume to 66

mic.enhancedOptions = UpdateMicOptions(mic.enhancedOptions);

private function UpdateMicOptions(options:MicrophoneEnhancedOptions):MicrophoneEnhancedOptions

{
                options.autoGain = false; //here is too late because I have 66 volume level
                return options;

}

Why this is happening? Is this bug? Because after disable autogain I can't change OS volume from my webbrowser Flash Player plugin.

I check this on 2 computers (Vista and Windows 7) with Flash Player ver. 10.3.183.7

Regards