Open your Volume Mixer, and from the File menu, choose to view the “Recording” settings, instead of the “Playback” settings (you may have to view a Properties dialog from the File menu; it’s been a while since I’ve used Windows XP in a facility that required me to tinker with that– also, the Volume Mixer can be accessed by either double-clicking the Speaker icon in your tasktray or selecting “Volume Mixer” from the Accessories menu under your Start menu). Check the box underneath the channel you want to record from. Done.