No sound recording

[H.S.Rai]

On my laptop Compaq Presario V3018TU, I am unable to record anything,
neither through buildin Mic nor through Mic with Head Set.

Gnome Sound Recorder, starts time on clicking "Record", but on
replaying, the progress is shown on time bar, but no sound comes.
During recording, Recording Level Monitor remain still.

In volume control, capture is full.

lspci gave following output:

0000:00:1b.0 0403: Intel Corporation 82801G (ICH7 Family) High
Definition Audio Controller (rev 02)

What I should I do?

-- 
H.S.Rai
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