OS : Mandrake 10.1
Sound card : Creative SoundBlaster

Before I reinstalled everything, I had Skype and every other software working with my microphone. I hade the same linux distribution (mandrake 10.1) so it isn't a problem with the driver.

Now, I hear sounds from my mycrophone, but softwares don't (Skype, gnomemeeting, audacity, gnome-sound-record).

with gnome-sound-record, I got the following error :
GConf audio sink not found, using osssink
DEBUG: gstgconf: error parsing pipeline (null) ! audioconvert ! audio/x-raw-int,rate=44100,channels=2 ! vorbisenc name=enc quality=0.5
no element "null"

** ERROR **: Could not construct pipeline
aborting...

Please help me! I really need Skype... It's my only phone.

Thanks

Did you ran alsaconfig?