I can't change my microphone because it is set to the built in microphone in my laptop. I tried the "check the show hidden devices" in recording tab and theres no hidden devices. Please Anyone help me... I'm so desperate now... Sorry for my bad english.
, however I manage to get it worked by updating my driver. Because last time my sound driver's name was "high definition audio" and I think my real driver for the sound drivers is realtek, so I searched it on google (the driver of realtek) and Downloaded it and updated my drivet and "viola", its now working.