Screen/Sound Recorder

Does anyone know of a FREE screen and sound recording program that works like http://www.camstudio.org?

I tried using it but it does not detect my sound card to record the sound on the PC. I need one that records pretty much the same way, but easier sound options.

Something that records in avi, mov, etc. Something that will play in Windows Media Player, Winamp, Quicktime, etc. You know, the common formats/players.

Thanks.