I'm using Ubuntu Hardy with KDE4, and my soundboard is a Creative Labs SoundBlaster Live. I have tried the various teachings on this site, but none have worked.
I have tried:
Changing the capture device (Through skype settings)
Changing the capture channel(Through kmix)
Putting the wire in different holes of the soundboard

Notes:
The capture doesn't work for audacity either, I'm not sure if it's related or not.
I can hear the things I say through my headphones, a friend of mine says it's supposed to be like that, I'm not that sure.

Thanks for the help