Microphone not working

[Antonio Montagnani]

I am running fully updated Fedora Core 4 with latest kernel
I installed Skype and during the echo test I realized that microphone 
was not working, so I installed Audacity and when it start I get an 
error during i/o initialization suggesting that I could have some 
problems in hearing or recording.Host error

When I start recording I get an error of opening the input device 
(please check the device options and sampling frequency)
Furtermore in audacity in Preferences I cannot choose anything in audio 
I/O playback or recording.
My sound card is recognized as an Intel 82801EB/ER(ICH5/ICH5R) Ac'97 
Audio Controller and slides are on...
Playback with other application (also Skype) is fine (Mp3 are o.k., 
streaming is o.k), I changed also the microphone.

Any Hint????

-- 
 Antonio
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Linux Fedora Core 4 on Home
Linux user number 362582
http://www.linuxsaronno.net
http://www.montagnani.org
Skype: antoniomontag
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