Hey Everyone!

I recently bought a headset with microphone included, But my friends on skype couldn't hear me well, So I changed the levels.
My friends could finally hear me. (Operation System: Windows 7)
I tried to sing on Karaokeparty, appeared like I was singing or there was a sound in the background.. Wasn't even singing and I was alone, So I thought it was a problem I could fix xD, It was like this



Tried to fix it but I don't know what did I do, Now I can't hear anything with my headset, youtube, music, nothing.. But when I click in sound options and watch some videos, It appears like it makes sound, but Can't hear it though, Here you can see it.. It's in Spanish but you'll know what is it



Can anyone tell me what to do with my sound? And If you know, how to modify my mic to use it on Karaokeparty too, I'd appreciate it

Sound is okay now, now I need to fix my mic.. Don't know why karaokeparty doesn't detect my voice, clicked on settings on the page,( because it works perfect on skype) and in my mic's sound bar appears like there is a weird sound. It detects that sound instead of my voice ( in the first spoiler you can see that)

Any ideas?