problem with gnome sound preferences....

Hi

When I tried to change some settings in Sound Preferences/Hardware tab (messing with arecord & xvidcap), my GNOME session got hanged up. After rebooting also, I have the same problem i.e GNOME is working and sound also working, but I cannot change anything in the Sound Preferences. If I changed I am loosing sound completely. Also, earlier I used to get my sound card listed in Sound Preferences/Hardware tab. Now everything gone :frowning:

This is very strange:|

What should I do now? Should I reinstall the system completely ? Or is there is anyway to reinstall only gnome? Any suggestions?

Thank you!

I have attached some screen shots…

http://img138.imageshack.us/img138/5883/soundcardadvancedoption.png
http://img19.imageshack.us/i/volumesettingsforcard0.png/

http://img186.imageshack.us/img186/3766/soundpreferences.png

http://img72.imageshack.us/img72/3193/volumesettingsforcard0.png