can t hear my voice on the internnal mocrophone

[Adel ESSAFI]

Dear list,
I have a dell D630  with kubuntu installed on. Every thing works fine
but the internet microphone  :( 
I have followed all instructions found on the net to fix this problem
but I have not succeed.
https://wiki.ubuntu.com/Gutsy_Intel_HD_Audio_Controller

I have tryed with krecord and skype to hear my own voice, but with no result.
Could you help please
Regards
Adel