My desktop uses alsa.
And the most strange is that there it worked fine, but when I played with the mixer it stoped working !!!!
And I thing that somethink blocks the access of the skype program to the sound server, because on some point it even stops ringing !!!
I am going to remove all the alsa libs utilities mixer and so on and the esound too and will install the newest alsa !
Meanwhile if some one has some other ideas please let me know!